APA-Zitierstil (7. Ausg.)

Barkley, A. P., & Barkley, P. W. (2020). Principles of agricultural economics (Third edition.). Routledge.

Chicago-Zitierstil (17. Ausg.)

Barkley, Andrew P., und Paul W. Barkley. Principles of Agricultural Economics. Third edition. Abingdon: Routledge, 2020.

MLA-Zitierstil (9. Ausg.)

Barkley, Andrew P., und Paul W. Barkley. Principles of Agricultural Economics. Third edition. Routledge, 2020.