Lua APA (7ú heag.)
Botkin, D. B., & Keller, E. A. (2012). Environmental science: International student version (8th ed.). John Wiley & Sons.
Lua i Stíl Chicago (17ú heag.)
Botkin, Daniel B., agus Edward A. Keller. Environmental Science: International Student Version. 8th ed. New Delhi: John Wiley & Sons, 2012.
Lua MLA (9ú heag.)
Botkin, Daniel B., agus Edward A. Keller. Environmental Science: International Student Version. 8th ed. John Wiley & Sons, 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.