APA (7th ed.) Citation

Barkley, A. P., & Barkley, P. W. (2013). Principles of agricultural economics. Routledge.

Chicago Style (17th ed.) Citation

Barkley, Andrew P., and Paul W. Barkley. Principles of Agricultural Economics. London [u.a.]: Routledge, 2013.

MLA (9th ed.) Citation

Barkley, Andrew P., and Paul W. Barkley. Principles of Agricultural Economics. Routledge, 2013.