APA (7th ed.) Citation

Watt, K. E. F. (1973). Principles of environmental science. McGraw-Hill.

Chicago Style (17th ed.) Citation

Watt, Kenneth E. F. Principles of Environmental Science. New York: McGraw-Hill, 1973.

MLA (9th ed.) Citation

Watt, Kenneth E. F. Principles of Environmental Science. McGraw-Hill, 1973.