Cita APA (7th ed.)

SpringerLink (Online service), Drechsel, H., & Zejda, M. (2005). Zdenek kopal's binary star legacy. Springer.

Cita Chicago (17th ed.)

SpringerLink (Online service), Horst Drechsel, i Miloslav Zejda. Zdenek Kopal's Binary Star Legacy. Dordrecht: Springer, 2005.

Cita MLA (8th ed.)

SpringerLink (Online service), et al. Zdenek Kopal's Binary Star Legacy. Springer, 2005.