Cita APA (7th ed.)

Martin, A. C., & Barkley, W. D. (2010). Seed identification manual. Scientific Publishers.

Cita Chicago (17th ed.)

Martin, Alexander C., i William D. Barkley. Seed Identification Manual. Scientific Publishers, 2010.

Cita MLA (9th ed.)

Martin, Alexander C., i William D. Barkley. Seed Identification Manual. Scientific Publishers, 2010.