Jorgensen, S. E., & Johnsen, I. (1981). Principles of environmental science and technology. Elsevier Scientific Pub. Co. ; Distributed by Elsevier North-Holland.
Lua i Stíl Chicago (17ú heag.)Jorgensen, Sven Erik, agus I. Johnsen. Principles of Environmental Science and Technology. Amsterdam ; New York : New York, N.Y.: Elsevier Scientific Pub. Co. ; Distributed by Elsevier North-Holland, 1981.
Lua MLA (8ú heag.)Jorgensen, Sven Erik, agus I. Johnsen. Principles of Environmental Science and Technology. Elsevier Scientific Pub. Co. ; Distributed by Elsevier North-Holland, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.