Cita APA (7a ed.)
Rañola, R. F., & Predo, C. (1997). The opportunity cost approach. In two approaches for estimating the on-site costs of soil erosion in the Philippines. Improving smallholder farming systems in Imperata areas of Southeast Asia.
Cita Chicago Style (17a ed.)
Rañola, Roberto F., y C. Predo. The Opportunity Cost Approach. In Two Approaches for Estimating the On-site Costs of Soil Erosion in the Philippines. Improving Smallholder Farming Systems in Imperata Areas of Southeast Asia. 1997.
Cita MLA (9a ed.)
Rañola, Roberto F., y C. Predo. The Opportunity Cost Approach. In Two Approaches for Estimating the On-site Costs of Soil Erosion in the Philippines. Improving Smallholder Farming Systems in Imperata Areas of Southeast Asia. 1997.
Precaución: Estas citas no son 100% exactas.