Cita APA (7a ed.)

Colwell, J. (1994). Estimating fertilizer requirements: A quantitative approach. CAB International.

Cita Chicago Style (17a ed.)

Colwell, J.D. Estimating Fertilizer Requirements: A Quantitative Approach. Wallingford: CAB International, 1994.

Cita MLA (8a ed.)

Colwell, J.D. Estimating Fertilizer Requirements: A Quantitative Approach. CAB International, 1994.