APA (7th ed.) Citation

Watry, C., Huguelet, A., & Niemer, D. (1968). What's happening?: A time for growing. Herder and Herder.

Chicago Style (17th ed.) Citation

Watry, Catherine, Arlène Huguelet, and Diane Niemer. What's Happening?: A Time for Growing. New York, NY: Herder and Herder, 1968.

MLA (9th ed.) Citation

Watry, Catherine, et al. What's Happening?: A Time for Growing. Herder and Herder, 1968.