Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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