Style de citation APA (7e éd.)

Cruz, W., Conway, Z. T., & Francisco, H. A. (1988). The on-site and downstream costs of soil erosion. Philippine Institute for Development Studies.

Style de citation Chicago (17e éd.)

Cruz, Wilfrido, Zenaida Tapawan Conway, et Herminia A. Francisco. The On-site and Downstream Costs of Soil Erosion. Makati, Metro Manila: Philippine Institute for Development Studies, 1988.

Style de citation MLA (9e éd.)

Cruz, Wilfrido, et al. The On-site and Downstream Costs of Soil Erosion. Philippine Institute for Development Studies, 1988.