Dyfyniad APA

Kaplan, U., Kennedy, W., & Scheer, U. (2006). The Bottrop Formation ammonites, Campanian, western Munsterland.

Dyfyniad Arddull Chicago

Kaplan, UK, W. Kennedy, and U. Scheer. The Bottrop Formation Ammonites, Campanian, Western Munsterland. 2006.

Dyfyniad MLA

Kaplan, UK, et al. The Bottrop Formation Ammonites, Campanian, Western Munsterland. 2006.

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