Cita APA (7th ed.)
Cunningham, W., & Cunningham, M. A. (2004). Principles of environmental science: Enquiry and applications (2nd ed.). Tata McGraw-Hill.
Cita Chicago (17th ed.)
Cunningham, William, i Mary Ann Cunningham. Principles of Environmental Science: Enquiry and Applications. 2nd ed. New Delhi: Tata McGraw-Hill, 2004.
Cita MLA (9th ed.)
Cunningham, William, i Mary Ann Cunningham. Principles of Environmental Science: Enquiry and Applications. 2nd ed. Tata McGraw-Hill, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.