APA (7th ed.) Citation

Zeilik, M., & Smith, E. v. P. (1987). Introductory astronomy and astrophysics (2nd ed.). Saunders College.

Chicago Style (17th ed.) Citation

Zeilik, Michael, and Elske v. P. Smith. Introductory Astronomy and Astrophysics. 2nd ed. Philadelphia, Pa: Saunders College, 1987.

MLA (9th ed.) Citation

Zeilik, Michael, and Elske v. P. Smith. Introductory Astronomy and Astrophysics. 2nd ed. Saunders College, 1987.