Gaya APA

Schneider, P. (2006). Extragalactic Astronomy and Cosmology An IntroductionExtragalactic Astronomy and Cosmology: An Introduction . New York: Springer Heidelberg.

Gaya MLA

Schneider, Peter. "Extragalactic Astronomy and Cosmology An IntroductionExtragalactic Astronomy and Cosmology: An Introduction". New York: Springer Heidelberg, 2006. Text.