Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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