Dyfyniad APA

Chaisson, E. (2007). Astronomy: A beginner's guide to the universe (5th ed.). Pearson/Benjamin Cummings.

Dyfyniad Arddull Chicago

Chaisson, Eric. Astronomy: A Beginner's Guide to the Universe. 5th ed. San Francisco CA: Pearson/Benjamin Cummings, 2007.

Dyfyniad MLA

Chaisson, Eric. Astronomy: A Beginner's Guide to the Universe. 5th ed. Pearson/Benjamin Cummings, 2007.

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