Using sources well is both an ethical and a craft issue. Plagiarism is presenting someone else's words, ideas, or work as one's own without proper attribution, whether the misstep is intentional or accidental, and a related pitfall is self-plagiarism, which is reusing one's own previously submitted work, or portions of it, in a new assignment without permission or proper citation. Three techniques allow writers to engage with sources faithfully: paraphrasing restates another's idea entirely in one's own vocabulary and sentence structure; quoting reproduces the exact words of the source enclosed in quotation marks; and summarizing condenses a longer passage or an entire source into a brief overview of its main ideas, omitting specific details and always including a citation. Paraphrasing requires more than swapping a few words; it must change both vocabulary and sentence structure, preserve the original meaning, and credit the source even though no quotation marks are used. Direct quotes should be reserved for moments when the exact wording is crucial, the language is particularly memorable or precise, or the writer plans to analyze the specific phrasing.
Quotations must also be integrated smoothly. A signal phrase introducing the author's name and a reporting verb (such as argues, claims, suggests, or notes) sets up the source before the quoted material appears. The widely recommended "quote sandwich" frames a quotation in three layers: context and the signal phrase to introduce it, the quotation itself, and analysis afterward that explains how it supports the argument. Long quotations, forty or more words in APA or four or more lines in MLA, are formatted as block quotes set off from the main text without quotation marks. When writers need to shorten a direct quotation, an ellipsis indicates words omitted from the middle of the source. When a quotation must be adjusted for grammar or clarity, brackets are used to insert clarifying words or changes without misrepresenting the original.
Writers rarely work with one source at a time. Synthesis writing goes beyond summarizing individual sources by combining information from multiple sources to create a new, unified understanding of the topic, drawing connections, contrasts, and patterns across them. A useful planning tool is the synthesis matrix, a grid that lists sources along one axis and themes or topics along the other so writers can compare how different authors address the same theme. A synthesis paragraph typically states a theme in a topic sentence, presents evidence from multiple sources, analyzes relationships among them, and connects findings back to the writer's own argument. Related tools support this work throughout a project: an annotated bibliography lists cited sources each followed by a brief descriptive and evaluative annotation that summarizes the source's argument, evaluates its credibility and relevance, and reflects on how it fits the writer's topic; a literature review is a comprehensive survey that synthesizes existing scholarship thematically, chronologically, methodologically, or theoretically, identifying themes, gaps, and debates to establish context, demonstrate knowledge of the field, and justify a new study.