APA (7th ed.) Citation

Justin, F., & Snyder, M. E. (1938). Directed observation in child development. Houghton Mifflin.

Chicago Style (17th ed.) Citation

Justin, Florence, and Mary Eunice Snyder. Directed Observation in Child Development. Boston: Houghton Mifflin, 1938.

MLA (9th ed.) Citation

Justin, Florence, and Mary Eunice Snyder. Directed Observation in Child Development. Houghton Mifflin, 1938.