APA (7th ed.) Citation

Zeilik, M., Gregory, S. A., & Smith, E. v. P. (1992). Introductory astronomy and astrophysics. Saunders College Publishing.

Chicago Style (17th ed.) Citation

Zeilik, Michael, Stephen A. Gregory, and Elske v. P. Smith. Introductory Astronomy and Astrophysics. Fort Worth: Saunders College Publishing, 1992.

MLA (8th ed.) Citation

Zeilik, Michael, et al. Introductory Astronomy and Astrophysics. Saunders College Publishing, 1992.