APA (7th ed.) Zitazioa

Illingworth, V. (1979). The Facts on the file dictionary of astronomy. Facts on File.

Chicago Style (17th ed.) Zitazioa

Illingworth, Valerie. The Facts on the File Dictionary of Astronomy. New York: Facts on File, 1979.

MLA (9th ed.) Zitazioa

Illingworth, Valerie. The Facts on the File Dictionary of Astronomy. Facts on File, 1979.