APA (7th ed.) Citation

Sangster, R. P. (1971). Environmental degradation: A selected bibliography. Council of Planning Librarians.

Chicago Style (17th ed.) Citation

Sangster, Robert Powell. Environmental Degradation: A Selected Bibliography. Monticello, Illinois: Council of Planning Librarians, 1971.

MLA (9th ed.) Citation

Sangster, Robert Powell. Environmental Degradation: A Selected Bibliography. Council of Planning Librarians, 1971.