Dyfyniad APA
Rich, L. G. (1973). Environmental systems engineering. McGraw-Hill.
Dyfyniad Arddull Chicago
Rich, Linvil Gene. Environmental Systems Engineering. New York: McGraw-Hill, 1973.
Dyfyniad MLA
Rich, Linvil Gene. Environmental Systems Engineering. McGraw-Hill, 1973.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.