APA (7th ed.) Citation

Morrison, D., & Wolff, S. C. (1994). Frontiers of astronomy (2nd ed.). Saunders College Pub..

Chicago Style (17th ed.) Citation

Morrison, David, and Sidney C. Wolff. Frontiers of Astronomy. 2nd ed. Philadelphia: Saunders College Pub., 1994.

MLA (9th ed.) Citation

Morrison, David, and Sidney C. Wolff. Frontiers of Astronomy. 2nd ed. Saunders College Pub., 1994.