Cita APA (7a ed.)

Kopal, Z. (1959). Close Binary Systems. John Wiley & Sons.

Cita Chicago Style (17a ed.)

Kopal, Zdenék. Close Binary Systems. New York: John Wiley & Sons, 1959.

Cita MLA (9a ed.)

Kopal, Zdenék. Close Binary Systems. John Wiley & Sons, 1959.