APA (7th ed.) Citation

Barker & Barker, R. (1941). Frustration and regression: An experiment with young children. [publisher not identified].

Chicago Style (17th ed.) Citation

Barker and Roger Barker. Frustration and Regression: An Experiment with Young Children. [Place of publication not identified]: [publisher not identified], 1941.

MLA (9th ed.) Citation

Barker and Roger Barker. Frustration and Regression: An Experiment with Young Children. [publisher not identified], 1941.