Cita APA

Courtney, F. M., & Trudgill, S. T. (1981). Soil: An introduction to soil study (2.). Edward Arnold.

Citación estilo Chicago

Courtney, F M., y S T. Trudgill. Soil: An Introduction to Soil Study. 2. London: Edward Arnold, 1981.

Cita MLA

Courtney, F M., y S T. Trudgill. Soil: An Introduction to Soil Study. 2. Edward Arnold, 1981.