APA (7th ed.) Citation

Barkley, A. P., & Barkley, P. W. (2020). Principles of Agricultural Economics (3rd ed.). Routledge.

Chicago Style (17th ed.) Citation

Barkley, Andrew P., and Paul W. Barkley. Principles of Agricultural Economics. 3rd ed. London: Routledge, 2020.

MLA (9th ed.) Citation

Barkley, Andrew P., and Paul W. Barkley. Principles of Agricultural Economics. 3rd ed. Routledge, 2020.