Dyfyniad APA

Seeds, M. A. (2001). Foundations of Astronomy (6th ed.). Brooks/Cole.

Dyfyniad Arddull Chicago

Seeds, Michael A. Foundations of Astronomy. 6th ed. Australia: Brooks/Cole, 2001.

Dyfyniad MLA

Seeds, Michael A. Foundations of Astronomy. 6th ed. Brooks/Cole, 2001.

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