Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.