APA aipamena

Dubeck, L. W. (1995). A world view of environmental issues. Saunders College.

Chicago Style aipamena

Dubeck, Leroy W. A World View of Environmental Issues. Fort Worth: Saunders College, 1995.

MLA aipamena

Dubeck, Leroy W. A World View of Environmental Issues. Saunders College, 1995.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.