Dyfyniad APA

Horneck, G., & Rettberg, P. (2007). Complete course in astrobiology. Wiley-VCH.

Dyfyniad Arddull Chicago

Horneck, Gerda, and Petra Rettberg. Complete Course in Astrobiology. Weinheim: Wiley-VCH, 2007.

Dyfyniad MLA

Horneck, Gerda, and Petra Rettberg. Complete Course in Astrobiology. Wiley-VCH, 2007.

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