APA Style
Zeilik, Michael, Gregory, Stephen A.. (1998).
Introductory Astronomy and Astrophysics (4th ed).
USA:
Brooks/cole.
Chicago Style
Zeilik, Michael, Gregory, Stephen A..
Introductory Astronomy and Astrophysics.
4th ed
USA:
Brooks/cole,
1998.
Textbook.
MLA Style
Zeilik, Michael, Gregory, Stephen A..
Introductory Astronomy and Astrophysics.
4th ed
USA:
Brooks/cole,
1998.
Textbook.
Turabian Style
Zeilik, Michael, Gregory, Stephen A..
Introductory Astronomy and Astrophysics.
4th ed
USA:
Brooks/cole,
1998.
Textbook.