Dyfyniad APA

Fix, J. D. (2004). Astronomy: Journey to the cosmic frontier (3rd ed.). Boston: McGraw-Hill Higher Education.

Dyfyniad Arddull Chicago

Fix, John D. Astronomy: Journey to the Cosmic Frontier. 3rd ed. Boston: McGraw-Hill Higher Education, 2004.

Dyfyniad MLA

Fix, John D. Astronomy: Journey to the Cosmic Frontier. 3rd ed. Boston: McGraw-Hill Higher Education, 2004.

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