Dyfyniad APA

Levy, D. H. (2001). David Levy's guide to the night sky. Cambridge, UK: Cambridge University Press.

Dyfyniad Arddull Chicago

Levy, David H. David Levy's Guide to the Night Sky. Cambridge, UK: Cambridge University Press, 2001.

Dyfyniad MLA

Levy, David H. David Levy's Guide to the Night Sky. Cambridge, UK: Cambridge University Press, 2001.

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