Cita APA (7a ed.)

Spectorsky, A. C. (1956). The book of the sky. Appleton-Century-Crofts.

Cita Chicago Style (17a ed.)

Spectorsky, A. C. The Book of the Sky. New York: Appleton-Century-Crofts, 1956.

Cita MLA (9a ed.)

Spectorsky, A. C. The Book of the Sky. Appleton-Century-Crofts, 1956.