Lua APA (7ú heag.)

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

Lua i Stíl Chicago (17ú heag.)

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

Lua MLA (8ú heag.)

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

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.