Cita APA (7a ed.)

Selwyn, E. (1950). Photography in astronomy. Eastman Kodak Company.

Cita Chicago Style (17a ed.)

Selwyn, E. Photography in Astronomy. New York: Eastman Kodak Company, 1950.

Cita MLA (9a ed.)

Selwyn, E. Photography in Astronomy. Eastman Kodak Company, 1950.