APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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