APA (7th ed.) Zitazioa

Pickering, K. T., & Owen, L. A. (1997). An introduction to global environmental issues (2nd ed.). Routledge.

Chicago Style (17th ed.) Zitazioa

Pickering, Kevin T., eta Lewis A. Owen. An Introduction to Global Environmental Issues. 2nd ed. London: Routledge, 1997.

MLA (9th ed.) Zitazioa

Pickering, Kevin T., eta Lewis A. Owen. An Introduction to Global Environmental Issues. 2nd ed. Routledge, 1997.