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.
استشهاد بنمط شيكاغوRojas, Luis Antonio, و Gerardo Chaves. Effect of Minimun and Conventional Tillage in Bean (Phaseolus Vulgaris L.) in the Northern Huetar Region in Costa Rica. 2006.
MLA استشهادRojas, Luis Antonio, و Gerardo Chaves. Effect of Minimun and Conventional Tillage in Bean (Phaseolus Vulgaris L.) in the Northern Huetar Region in Costa Rica. 2006.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.