Dyfyniad APA

(2012). An INTRODUCTION to physical geography and the environment. Pearson.

Dyfyniad Arddull Chicago

An INTRODUCTION to Physical Geography and the Environment. Pearson, 2012.

Dyfyniad MLA

An INTRODUCTION to Physical Geography and the Environment. Pearson, 2012.

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