Dyfyniad APA

Walther, J. V. (2010). Essential of geochemistry (2nd ed.). Jones and Bartlett.

Dyfyniad Arddull Chicago

Walther, John V. Essential of Geochemistry. 2nd ed. Boston: Jones and Bartlett, 2010.

Dyfyniad MLA

Walther, John V. Essential of Geochemistry. 2nd ed. Jones and Bartlett, 2010.

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