Dyfyniad APA

Chanlett, E. T. Environmental protection. McGraw-Hill Book Company.

Dyfyniad Arddull Chicago

Chanlett, Emil T. Environmental Protection. McGraw-Hill Book Company.

Dyfyniad MLA

Chanlett, Emil T. Environmental Protection. McGraw-Hill Book Company.

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