APA-viite (7. p.)

Gregersen, H. M., & Contreras, A. H. (1979). Forestry for local community development. Food and Agriculture Organization of the United Nations.

Chicago-viite (17. p.)

Gregersen, H. M., ja Arnoldo H. Contreras. Forestry for Local Community Development. Rome: Food and Agriculture Organization of the United Nations, 1979.

MLA-viite (9. p.)

Gregersen, H. M., ja Arnoldo H. Contreras. Forestry for Local Community Development. Food and Agriculture Organization of the United Nations, 1979.