Goldfarb, T. D. (1997). Sources: Notable selections in environmental studies. Brown and Benchmark.
Lua i Stíl Chicago (17ú heag.)Goldfarb, Theodore D. Sources: Notable Selections in Environmental Studies. New York: Brown and Benchmark, 1997.
Lua MLA (9ú heag.)Goldfarb, Theodore D. Sources: Notable Selections in Environmental Studies. Brown and Benchmark, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.