Cita APA (7a ed.)

Evans, D. S. (1968). Observation in modern astronomy. American Elsevier Publishing Company.

Cita Chicago Style (17a ed.)

Evans, David S. Observation in Modern Astronomy. New York: American Elsevier Publishing Company, 1968.

Cita MLA (9a ed.)

Evans, David S. Observation in Modern Astronomy. American Elsevier Publishing Company, 1968.