Cita APA (7a ed.)

Townsend, W. N., & Comber, N. M. (1973). An introduction to the scientific study of the soil (5th ed.). St. Martin's Press.

Cita Chicago Style (17a ed.)

Townsend, Wilfred Norman, y Norman Mederson Comber. An Introduction to the Scientific Study of the Soil. 5th ed. New York: St. Martin's Press, 1973.

Cita MLA (9a ed.)

Townsend, Wilfred Norman, y Norman Mederson Comber. An Introduction to the Scientific Study of the Soil. 5th ed. St. Martin's Press, 1973.