SpringerLink (Online service), Drechsel, H., & Zejda, M. (2005). Zdenek kopal's binary star legacy. Springer.
芝加哥风格引文SpringerLink (Online service), Horst Drechsel, 与 Miloslav Zejda. Zdenek Kopal's Binary Star Legacy. Dordrecht: Springer, 2005.
MLA引文SpringerLink (Online service), et al. Zdenek Kopal's Binary Star Legacy. Springer, 2005.
警告：这些引文格式不一定是100％准确.