Cita APA (7a ed.)

Watkins, F. C., & Dilligham, W. B. (1989). Practical English Handbook (8th. ed.). Houghton Mifflin Co..

Cita Chicago Style (17a ed.)

Watkins, Floyd C., y William B. Dilligham. Practical English Handbook. 8th. ed. Boston: Houghton Mifflin Co., 1989.

Cita MLA (8a ed.)

Watkins, Floyd C., y William B. Dilligham. Practical English Handbook. 8th. ed. Houghton Mifflin Co., 1989.