APA način citiranja

Rojas, L. A., & Chaves, G. (2006). Effect of minimun and conventional tillage in bean (Phaseolus vulgaris L.) in the Northern Huetar Region in Costa Rica.

Čikaški stil citiranja

Rojas, Luis Antonio, i Gerardo Chaves. Effect of Minimun and Conventional Tillage in Bean (Phaseolus Vulgaris L.) in the Northern Huetar Region in Costa Rica. 2006.

MLA način citiranja

Rojas, Luis Antonio, i Gerardo Chaves. Effect of Minimun and Conventional Tillage in Bean (Phaseolus Vulgaris L.) in the Northern Huetar Region in Costa Rica. 2006.