Dyfyniad APA

Wicander, R. (2021). Geology: Earth in perspective (Third edition.). Cengage Learning, Inc.

Dyfyniad Arddull Chicago

Wicander, Reed. Geology: Earth in Perspective. Third edition. Boston: Cengage Learning, Inc, 2021.

Dyfyniad MLA

Wicander, Reed. Geology: Earth in Perspective. Third edition. Cengage Learning, Inc, 2021.

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