Dyfyniad APA

DAVIS BARBARA. (2019). MINERALS, ROCK AND SOIL (2009 Ed.). RAINTREE PUBLISHERS.

Dyfyniad Arddull Chicago

DAVIS BARBARA. MINERALS, ROCK AND SOIL. 2009 Ed. CHICAGO: RAINTREE PUBLISHERS, 2019.

Dyfyniad MLA

DAVIS BARBARA. MINERALS, ROCK AND SOIL. 2009 Ed. RAINTREE PUBLISHERS, 2019.

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