APA aipamena

University Grants Commission. (2008). Textbook of environmental studies for understanding courses.

Chicago Style aipamena

University Grants Commission. Textbook of Environmental Studies for Understanding Courses. University press, 2008.

MLA aipamena

University Grants Commission. Textbook of Environmental Studies for Understanding Courses. 2008.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.