Cita APA (7a ed.)

Bok, B. J. (1959). The astronomers universe. Cambridge University Press.

Cita Chicago Style (17a ed.)

Bok, Bart J. The Astronomers Universe. London: Cambridge University Press, 1959.

Cita MLA (9a ed.)

Bok, Bart J. The Astronomers Universe. Cambridge University Press, 1959.