APA (7th ed.) Zitazioa

Watts, S., & Halliwell, L. (1996). Essential environmental science: Methods & techniques. Routledge.

Chicago Style (17th ed.) Zitazioa

Watts, Simon, eta Lyndsay Halliwell. Essential Environmental Science: Methods & Techniques. New York: Routledge, 1996.

MLA (9th ed.) Zitazioa

Watts, Simon, eta Lyndsay Halliwell. Essential Environmental Science: Methods & Techniques. Routledge, 1996.