APA (7th ed.) Citation

Ryden, B. S. (2014). Introduction to cosmology (1. ed.). Pearson.

Chicago Style (17th ed.) Citation

Ryden, Barbara Sue. Introduction to Cosmology. 1. ed. Essex: Pearson, 2014.

MLA (9th ed.) Citation

Ryden, Barbara Sue. Introduction to Cosmology. 1. ed. Pearson, 2014.