APA (7th ed.) Citation

Duckham, A. N., & Masefield, G. B. (1971). Farming systems of the world. Chatto & Windus.

Chicago Style (17th ed.) Citation

Duckham, A. N., and G. B. Masefield. Farming Systems of the World. London: Chatto & Windus, 1971.

MLA (9th ed.) Citation

Duckham, A. N., and G. B. Masefield. Farming Systems of the World. Chatto & Windus, 1971.

Warning: These citations may not always be 100% accurate.