Lua APA (7ú heag.)

Trimmer, J. F. (1995). Writing with a purpose (11th ed.). Houghton Mifflin Co..

Lua i Stíl Chicago (17ú heag.)

Trimmer, Joseph F. Writing with a Purpose. 11th ed. Boston: Houghton Mifflin Co., 1995.

Lua MLA (9ú heag.)

Trimmer, Joseph F. Writing with a Purpose. 11th ed. Houghton Mifflin Co., 1995.

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