Παραπομπή APA

Eicher, D. J. (2013). Comets: :visitors from deep space. Cambridge University press.

Παραπομπή Chicago Style

Eicher, David J. Comets: :visitors from Deep Space. New York: Cambridge University press, 2013.

Παραπομπή MLA

Eicher, David J. Comets: :visitors from Deep Space. Cambridge University press, 2013.