Dyfyniad APA

Jorgensen, S. E., & Johnsen, I. (1981). Principles of environmental science and technology. Elsevier Scientific Pub. Co. ; Distributed by Elsevier North-Holland.

Dyfyniad Arddull Chicago

Jorgensen, Sven Erik, and 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.

Dyfyniad MLA

Jorgensen, Sven Erik, and I. Johnsen. Principles of Environmental Science and Technology. Elsevier Scientific Pub. Co. ; Distributed by Elsevier North-Holland, 1981.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.