APA (7th ed.) Citation

Elkins, K., & Porter, M. P. (1966). Classroom research on subgroup experiences in a U.S. history class. Purdue University.

Chicago Style (17th ed.) Citation

Elkins, Keith, and Martha Peck Porter. Classroom Research on Subgroup Experiences in a U.S. History Class. Lafayette, Ind.: Purdue University, 1966.

MLA (9th ed.) Citation

Elkins, Keith, and Martha Peck Porter. Classroom Research on Subgroup Experiences in a U.S. History Class. Purdue University, 1966.