Park, C. C. (1981). Ecology and environmental management: A geographical perspective. Butterworths.
Lua i Stíl Chicago (17ú heag.)Park, Chris C. Ecology and Environmental Management: A Geographical Perspective. London: Butterworths, 1981.
Lua MLA (9ú heag.)Park, Chris C. Ecology and Environmental Management: A Geographical Perspective. Butterworths, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.