APA (7th ed.) Citation

Abell, G. O. (1982). Exploration of the universe (4. ed.). Saunders.

Chicago Style (17th ed.) Citation

Abell, George O. Exploration of the Universe. 4. ed. Philadelphia: Saunders, 1982.

MLA (9th ed.) Citation

Abell, George O. Exploration of the Universe. 4. ed. Saunders, 1982.