APA (7th ed.) Citation

Ryden, B. S. (2014). Introduction to cosmology (Pearson new international edition.). Pearson.

Chicago Style (17th ed.) Citation

Ryden, Barbara Sue. Introduction to Cosmology. Pearson new international edition. Harlow: Pearson, 2014.

MLA (8th ed.) Citation

Ryden, Barbara Sue. Introduction to Cosmology. Pearson new international edition. Pearson, 2014.