APA (7th ed.) Citation

Butts, D. P., Lee, A. E., & Warren, B. (1968). Watermelon. Steck-Vaughn.

Chicago Style (17th ed.) Citation

Butts, David P., Addison E. Lee, and Betsy Warren. Watermelon. Austin, TX: Steck-Vaughn, 1968.

MLA (9th ed.) Citation

Butts, David P., et al. Watermelon. Steck-Vaughn, 1968.