APA-viite (7. p.)

Gregersen, H., Brooks, K., Dixon, J., & Hamilton, L. (1987). Guidelines for economic appraisal of watershed management projects. Food and Agriculture Organization of the United Nations.

Chicago-viite (17. p.)

Gregersen, H.M, K.N Brooks, J.A Dixon, ja L.S Hamilton. Guidelines for Economic Appraisal of Watershed Management Projects. Rome, Italy: Food and Agriculture Organization of the United Nations, 1987.

MLA-viite (9. p.)

Gregersen, H.M, et al. Guidelines for Economic Appraisal of Watershed Management Projects. Food and Agriculture Organization of the United Nations, 1987.