Dyfyniad APA

Travis Hudson. (2012). Living with Earth: An Introduction to Environmental Geology. PHI Learning.

Dyfyniad Arddull Chicago

Travis Hudson. Living with Earth: An Introduction to Environmental Geology. NewDelhi: PHI Learning, 2012.

Dyfyniad MLA

Travis Hudson. Living with Earth: An Introduction to Environmental Geology. PHI Learning, 2012.

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