APA (7th ed.) Citation

Illinois Society for Mental Hygiene, Child, C. M., & Dummer, E. S. (1928). The Unconscious: A symposium. A. A. Knopf.

Chicago Style (17th ed.) Citation

Illinois Society for Mental Hygiene, C. M. Child, and Ethel Sturges Dummer. The Unconscious: A Symposium. New York: A. A. Knopf, 1928.

MLA (8th ed.) Citation

Illinois Society for Mental Hygiene, et al. The Unconscious: A Symposium. A. A. Knopf, 1928.