Dyfyniad APA
Peirce, J. J., Weiner, R. F., & Vesilind, P. A. (1998). Environmental pollution and control (4th ed.). Butterworth-Heinemann.
Dyfyniad Arddull Chicago
Peirce, J. Jeffrey, Ruth F. Weiner, and P. Aarne Vesilind. Environmental Pollution and Control. 4th ed. Boston: Butterworth-Heinemann, 1998.
Dyfyniad MLA
Peirce, J. Jeffrey, et al. Environmental Pollution and Control. 4th ed. Butterworth-Heinemann, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.