Dyfyniad APA

Bely, P., Christian, C., & Roy, J. (2010). A question and answer guide to astronomy. Cambridge University Press.

Dyfyniad Arddull Chicago

Bely, Pierre-Yves, Carol Christian, and Jean-René Roy. A Question and Answer Guide to Astronomy. Cambridge, UK: Cambridge University Press, 2010.

Dyfyniad MLA

Bely, Pierre-Yves, et al. A Question and Answer Guide to Astronomy. Cambridge University Press, 2010.

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