Cita APA (7a ed.)

Watkins, F. C. y. W. B. D. (1982). Practical english handbook (6.). Houghton Mifflin.

Cita Chicago Style (17a ed.)

Watkins, Floyd C. y William B. Dillingham. Practical English Handbook. 6. Boston, Estados Unidos: Houghton Mifflin, 1982.

Cita MLA (9a ed.)

Watkins, Floyd C. y William B. Dillingham. Practical English Handbook. 6. Houghton Mifflin, 1982.