Cita APA (7a ed.)

Owen, O. S. (1980). Natural resource conservation: An ecological approach (3rd ed.). Macmillan.

Cita Chicago Style (17a ed.)

Owen, Oliver S. Natural Resource Conservation: An Ecological Approach. 3rd ed. London: Macmillan, 1980.

Cita MLA (9a ed.)

Owen, Oliver S. Natural Resource Conservation: An Ecological Approach. 3rd ed. Macmillan, 1980.