APA (7th ed.) Citation

Morrison David, Wolff Sidney C., & Fraknoi Andrew. (1995). Abell's exploration of the universe (7th ed.). Saunders College.

Chicago Style (17th ed.) Citation

Morrison David, Wolff Sidney C., and Fraknoi Andrew. Abell's Exploration of the Universe. 7th ed. Saunders College, 1995.

MLA (8th ed.) Citation

Morrison David, et al. Abell's Exploration of the Universe. 7th ed. Saunders College, 1995.