Cita APA (7th ed.)

MCCRIMMON, J. M., TRIMMER, J. F., & SOMMERS, N. I. (1984). Writing with a purpose. -- 8th ed. Houghton Mifflin.

Cita Chicago (17th ed.)

MCCRIMMON, James M., Joseph F. TRIMMER, i Nancy I. SOMMERS. Writing with a Purpose. -- 8th Ed. Boston: Houghton Mifflin, 1984.

Cita MLA (9th ed.)

MCCRIMMON, James M., et al. Writing with a Purpose. -- 8th Ed. Houghton Mifflin, 1984.