Final answer:
Copying verbatim without citation is not an acceptable way to incorporate source material, as it can lead to plagiarism. Paraphrasing, summarizing, and proper citation are appropriate methods of incorporating source material into new content.
Step-by-step explanation:
When incorporating classified source material into new material, the only incorrect method listed is copying verbatim without citation. This act could be considered plagiarism, which is the use of someone else's work or ideas without proper attribution. The acceptable ways to use source material are through paraphrasing the content, which involves restating the text in your own words; summarizing the main points, which involves condensing the source material while keeping the key messages; and providing proper citations and references for any direct quotations or paraphrased material. Proper citations are crucial in academic writing to maintain credibility and avoid plagiarism.