Citazione Stile APA (7a Edizione)

Nelson, D. (1997). Student Study Guide to Accompany Environmental Science: A Global Concern (4th ed.). WCB/McGraw-Hill.

Citazione stile Chigago Style (17a edizione)

Nelson, Darby. Student Study Guide to Accompany Environmental Science: A Global Concern. 4th ed. Boston: WCB/McGraw-Hill, 1997.

Citatione MLA (9a ed.)

Nelson, Darby. Student Study Guide to Accompany Environmental Science: A Global Concern. 4th ed. WCB/McGraw-Hill, 1997.