Dyfyniad APA

Dale B. Hahn, W. A. P. Focus on health. McGraw-Hill.

Dyfyniad Arddull Chicago

Dale B. Hahn, Wayne A. Payne. Focus on Health. McGraw-Hill.

Dyfyniad MLA

Dale B. Hahn, Wayne A. Payne. Focus on Health. McGraw-Hill.

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