Dyfyniad APA

Fix, J. D. (2006). Astronomy: Journey to the cosmic frontier. New York: McGraw-Hill Higher Education.

Dyfyniad Arddull Chicago

Fix, John D. Astronomy: Journey to the Cosmic Frontier. New York: McGraw-Hill Higher Education, 2006.

Dyfyniad MLA

Fix, John D. Astronomy: Journey to the Cosmic Frontier. New York: McGraw-Hill Higher Education, 2006.

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