APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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