APA ציטוט

Owen, O. . S. (1980). Natural resource conservation: : an ecological approach/3rd ed. MacMillan press.

Chicago Edition Citation

Owen, Oliver S. Natural Resource Conservation: : An Ecological Approach/3rd Ed. New York: MacMillan press, 1980.

ציטוט MLA

Owen, Oliver S. Natural Resource Conservation: : An Ecological Approach/3rd Ed. MacMillan press, 1980.