Cita APA (7th ed.)

Williams, C. B., & Stevenson, A. H. (1940). A research manual, with a bibliographical guide to college studies and interests. Harper & brothers.

Cita Chicago (17th ed.)

Williams, Cecil Brown, i Allan H. Stevenson. A Research Manual, with a Bibliographical Guide to College Studies and Interests. New York and London: Harper & brothers, 1940.

Cita MLA (9th ed.)

Williams, Cecil Brown, i Allan H. Stevenson. A Research Manual, with a Bibliographical Guide to College Studies and Interests. Harper & brothers, 1940.