APA (7th ed.) Citation

Sobel, B., & Bookman, S. (1989). Words at work: Vocabulary building through reading. Collier Macmillan.

Chicago Style (17th ed.) Citation

Sobel, Betty, and Susan Bookman. Words at Work: Vocabulary Building Through Reading. New York, NY: Collier Macmillan, 1989.

MLA (9th ed.) Citation

Sobel, Betty, and Susan Bookman. Words at Work: Vocabulary Building Through Reading. Collier Macmillan, 1989.