Lua APA (7ú heag.)
Gangel, K. O. (1974). 24 ways to improve your teaching. Victor Books.
Lua i Stíl Chicago (17ú heag.)
Gangel, Kenneth O. 24 Ways to Improve Your Teaching. Wheaton, Ill.: Victor Books, 1974.
Lua MLA (9ú heag.)
Gangel, Kenneth O. 24 Ways to Improve Your Teaching. Victor Books, 1974.
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