APA (7th ed.) Citation

Allen, S. W. (1966). Conserving natural resources (3rd ed.). McGraw-Hill.

Chicago Style (17th ed.) Citation

Allen, Shirley Walter. Conserving Natural Resources. 3rd ed. New York: McGraw-Hill, 1966.

MLA (9th ed.) Citation

Allen, Shirley Walter. Conserving Natural Resources. 3rd ed. McGraw-Hill, 1966.