APA (7th ed.) Citation

Abell, G. O. (1984). Realm of the universe (3rd ed.). Saunders College Pub.

Chicago Style (17th ed.) Citation

Abell, George O. Realm of the Universe. 3rd ed. Philadelphia: Saunders College Pub, 1984.

MLA (9th ed.) Citation

Abell, George O. Realm of the Universe. 3rd ed. Saunders College Pub, 1984.