APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (8e ed.) Bronvermelding

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