Dyfyniad APA

Tillery, B. W. (2012). Physical science (Ninth edition.). McGraw-Hill.

Dyfyniad Arddull Chicago

Tillery, Bill W. Physical Science. Ninth edition. New York, NY: McGraw-Hill, 2012.

Dyfyniad MLA

Tillery, Bill W. Physical Science. Ninth edition. McGraw-Hill, 2012.

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