Dyfyniad APA

FAULKNER REBECCA. (2019). GEOLOGY ROCKS METAMORPHIC ROCK (2009 Ed.). RAINTREE PUBLISHERS.

Dyfyniad Arddull Chicago

FAULKNER REBECCA. GEOLOGY ROCKS METAMORPHIC ROCK. 2009 Ed. CHICAGO: RAINTREE PUBLISHERS, 2019.

Dyfyniad MLA

FAULKNER REBECCA. GEOLOGY ROCKS METAMORPHIC ROCK. 2009 Ed. RAINTREE PUBLISHERS, 2019.

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