Cita APA (7th ed.)

California Fertilizer Association. Soil Improvement Committee. (1990). Western fertilizer handbook. Interstate Publishers.

Cita Chicago (17th ed.)

California Fertilizer Association. Soil Improvement Committee. Western Fertilizer Handbook. Danville: Interstate Publishers, 1990.

Cita MLA (9th ed.)

California Fertilizer Association. Soil Improvement Committee. Western Fertilizer Handbook. Interstate Publishers, 1990.