APA (7th ed.) Citation

Duckham, A. N., & Masefield, G. B. (1970). Farming systems of the world. Praeger.

Chicago Style (17th ed.) Citation

Duckham, Alec N., and Geoffrey B. Masefield. Farming Systems of the World. New York [u.a.]: Praeger, 1970.

MLA (9th ed.) Citation

Duckham, Alec N., and Geoffrey B. Masefield. Farming Systems of the World. Praeger, 1970.