Dyfyniad APA

COBB, A. (2007). CHEMISTRY MATTER'S: CHEMISTRY IN ACTION. BROWN REFERENCE GROUP.

Dyfyniad Arddull Chicago

COBB, ALLAN.B. CHEMISTRY MATTER'S: CHEMISTRY IN ACTION. LONDON: BROWN REFERENCE GROUP, 2007.

Dyfyniad MLA

COBB, ALLAN.B. CHEMISTRY MATTER'S: CHEMISTRY IN ACTION. BROWN REFERENCE GROUP, 2007.

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