APA (7th ed.) Citation

Trecker, H. B. 1., & Trecker, A. R. (1952). How to work with groups. Woman's Press.

Chicago Style (17th ed.) Citation

Trecker, Harleigh Bradley 1911, and Audrey R. Trecker. How to Work with Groups. New York: Woman's Press, 1952.

MLA (9th ed.) Citation

Trecker, Harleigh Bradley 1911, and Audrey R. Trecker. How to Work with Groups. Woman's Press, 1952.