Dyfyniad APA
Henry, J. G., & Heinke, G. W. (1996). Environmental science and engineering (2nd ed.). Pearson Education.
Dyfyniad Arddull Chicago
Henry, J. Glynn, and Gary W. Heinke. Environmental Science and Engineering. 2nd ed. New Delhi: Pearson Education, 1996.
Dyfyniad MLA
Henry, J. Glynn, and Gary W. Heinke. Environmental Science and Engineering. 2nd ed. Pearson Education, 1996.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.