MLA

Harwit, Martin, et al. Astrophysical Concepts. Springer New York, 2006.

APA

Harwit, M., Burkert, A., Börner, G., & Burton, W. B. (2006). Astrophysical Concepts. Springer New York.

Chicago

Harwit, Martin, A Burkert, G Börner, and W. B Burton. Astrophysical Concepts. : Springer New York, 2006.