Dyfyniad APA

Bely, P. (2010). Question and answer guide to astronomy. Cambridge University Press.

Dyfyniad Arddull Chicago

Bely, Pierre-yvesetc. Question and Answer Guide to Astronomy. New Delhi: Cambridge University Press, 2010.

Dyfyniad MLA

Bely, Pierre-yvesetc. Question and Answer Guide to Astronomy. Cambridge University Press, 2010.

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