APA (7th ed.) Citation

Gregersen, H. M., & Contreras, A. H. (1979). Economic analysis of forestry projects. Food and Agriculture Organization of the United Nations.

Chicago Style (17th ed.) Citation

Gregersen, H. M., and Arnoldo H. Contreras. Economic Analysis of Forestry Projects. Rome: Food and Agriculture Organization of the United Nations, 1979.

MLA (9th ed.) Citation

Gregersen, H. M., and Arnoldo H. Contreras. Economic Analysis of Forestry Projects. Food and Agriculture Organization of the United Nations, 1979.