Cita APA (7th ed.)

Beckman, T. N., Maynard, H. H., & Davidson, W. R. (1957). Principles of marketing (6th ed.). Ronald Press Co.

Cita Chicago (17th ed.)

Beckman, Theodore N., Harold H. Maynard, i William R. Davidson. Principles of Marketing. 6th ed. New York [N.Y.]: Ronald Press Co, 1957.

Cita MLA (9th ed.)

Beckman, Theodore N., et al. Principles of Marketing. 6th ed. Ronald Press Co, 1957.