APA (7. basım) Alıntı

Villanueva, R., Dulce, L., & Guzman, R. B. (2012). Rio+20: United Nations Conference on Sustainable Development. DZUP.

Chicago Style (17. basım) Atıf

Villanueva, Raymund, Leon Dulce, ve Rosario Bella Guzman. Rio+20: United Nations Conference on Sustainable Development. Quezon City: DZUP, 2012.

MLA (9th ed.) Atıf

Villanueva, Raymund, et al. Rio+20: United Nations Conference on Sustainable Development. DZUP, 2012.