APA (7th ed.) Citation

Watkins, F. C., Dillingham, W. B., & Martin, E. A. (1965). Practical English handbook. Houghton Mifflin.

Chicago Style (17th ed.) Citation

Watkins, Floyd C., William B. Dillingham, and Elizabeth A. Martin. Practical English Handbook. Boston: Houghton Mifflin, 1965.

MLA (9th ed.) Citation

Watkins, Floyd C., et al. Practical English Handbook. Houghton Mifflin, 1965.