APA (7th ed.) Citation

Singer, S. F. (1971). Is there an optimum level of population? McGraw-Hill.

Chicago Style (17th ed.) Citation

Singer, S. Fred. Is There an Optimum Level of Population? New York: McGraw-Hill, 1971.

MLA (9th ed.) Citation

Singer, S. Fred. Is There an Optimum Level of Population? McGraw-Hill, 1971.