APA (7e ed.) Bronvermelding
Cunningham, W., & Cunningham, M. A. (2004). Principles of environmental science: Enquiry and applications (2nd ed.). Tata McGraw-Hill.
Chicago (17e ed.) Bronvermelding
Cunningham, William, en Mary Ann Cunningham. Principles of Environmental Science: Enquiry and Applications. 2nd ed. New Delhi: Tata McGraw-Hill, 2004.
MLA (9e ed.) Bronvermelding
Cunningham, William, en Mary Ann Cunningham. Principles of Environmental Science: Enquiry and Applications. 2nd ed. Tata McGraw-Hill, 2004.
Let op: Deze citaties zijn niet altijd 100% accuraat.