Dyfyniad APA

Walter, J. V. (2010). Essentials of geochemistry: : 2nd ed (2nd ed.). Jones and Bartlett publishers.

Dyfyniad Arddull Chicago

Walter, John V. Essentials of Geochemistry: : 2nd Ed. 2nd ed. Singapore: Jones and Bartlett publishers, 2010.

Dyfyniad MLA

Walter, John V. Essentials of Geochemistry: : 2nd Ed. 2nd ed. Jones and Bartlett publishers, 2010.

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