Dyfyniad APA
Peavy, H. S., & Rowe, D. R. (1985). Environmental engineering. McGraw-Hill.
Dyfyniad Arddull Chicago
Peavy, Howard S., and Donald R/Tchobanoglous Rowe. Environmental Engineering. New Delhi: McGraw-Hill, 1985.
Dyfyniad MLA
Peavy, Howard S., and Donald R/Tchobanoglous Rowe. Environmental Engineering. McGraw-Hill, 1985.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.