APA-ийн эшлэл(7 дахь хэвлэлт)
Delaware Technical and Community College (Southern campus). English Dept & Lewis, S. D. (1992). Writing skills for technical students (3rd ed.). Prentice Hall.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)
Delaware Technical and Community College (Southern campus). English Dept ба Sara Drew Lewis. Writing Skills for Technical Students. 3rd ed. Englewood Cliffs, N.J.: Prentice Hall, 1992.
MLA -ийн эшлэл (9 дэх хэвлэлт)
Delaware Technical and Community College (Southern campus). English Dept ба Sara Drew Lewis. Writing Skills for Technical Students. 3rd ed. Prentice Hall, 1992.
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