Cita APA (7th ed.)
Trimmer, J. F. (1995). Writing with a purpose (11th ed.). Houghton Mifflin Co..
Cita Chicago (17th ed.)
Trimmer, Joseph F. Writing with a Purpose. 11th ed. Boston: Houghton Mifflin Co., 1995.
Cita MLA (9th ed.)
Trimmer, Joseph F. Writing with a Purpose. 11th ed. Houghton Mifflin Co., 1995.
Atenció: Aquestes cites poden no estar 100% correctes.