APA (7th ed.) Citation

Mass-Observation, Mass-Observation Archive, Last, N., & Mitchison, N. (1939). Directive replies.

Chicago Style (17th ed.) Citation

Mass-Observation, Mass-Observation Archive, Nella Last, and Naomi Mitchison. Directive Replies. 1939.

MLA (9th ed.) Citation

Mass-Observation, et al. Directive Replies. 1939.

Warning: These citations may not always be 100% accurate.