APA Edition Citation

Zeilik, M. S. (1987). Introductory astronomy and astrophysics (2.).

Chicago Edition Citation

Zeilik, Michael; Smith. Introductory Astronomy and Astrophysics. 2. Saunders College Publishing, New York, 1987.

MLA Edition Citation

Zeilik, Michael; Smith. Introductory Astronomy and Astrophysics. 2. 1987.

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