Cita APA (7th ed.)

Zeilik, M. (1998). Introductory Astronomy and Astrophysics (4th ed.). Saunders College Publishing.

Cita Chicago (17th ed.)

Zeilik, Michael. Introductory Astronomy and Astrophysics. 4th ed. Fort Worth: Saunders College Publishing, 1998.

Cita MLA (9th ed.)

Zeilik, Michael. Introductory Astronomy and Astrophysics. 4th ed. Saunders College Publishing, 1998.