Παραπομπή σε μορφή APA (7η εκδ.)

Zeilik, M., & Gregory, S. A. (1998). Introductory astronomy and astrophysics (4th edition.). Saunders College Publishing.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Zeilik, Michael, και Stephen A. Gregory. Introductory Astronomy and Astrophysics. 4th edition. Fort Worth: Saunders College Publishing, 1998.

Παραπομπή σε μορφή MLA (8th εκδ.)

Zeilik, Michael, και Stephen A. Gregory. Introductory Astronomy and Astrophysics. 4th edition. Saunders College Publishing, 1998.