Hefferman, J. A. (1986). Writing: A college handbook (2nd ed.). W.W.Norton & co..
Lua i Stíl Chicago (17ú heag.)Hefferman, James A.W. Writing: A College Handbook. 2nd ed. New York: W.W.Norton & co., 1986.
Lua MLA (9ú heag.)Hefferman, James A.W. Writing: A College Handbook. 2nd ed. W.W.Norton & co., 1986.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.