Dyfyniad APA

Kiely, G. (1997). Environmental engineering. London: McGraw-Hill.

Dyfyniad Arddull Chicago

Kiely, Gerard. Environmental Engineering. London: McGraw-Hill, 1997.

Dyfyniad MLA

Kiely, Gerard. Environmental Engineering. London: McGraw-Hill, 1997.

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