APA aipamena

Fix, J. D. (1999). Astronomy: Journey to the cosmic frontier. WCB/McGraw-Hill.

Chicago Style aipamena

Fix, John D. Astronomy: Journey to the Cosmic Frontier. WCB/McGraw-Hill, 1999.

MLA aipamena

Fix, John D. Astronomy: Journey to the Cosmic Frontier. WCB/McGraw-Hill, 1999.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.