Gaya APA
Zeilik, Michael & Gregory, Stephen A.. (1998).
Introductory Astronomy & Astrophysics (Fourth Edition).
Amerika:
Cengage Learning.
Gaya Chicago
Zeilik, Michael & Gregory, Stephen A..
Introductory Astronomy & Astrophysics.
Fourth Edition
Amerika:
Cengage Learning,
1998.
Printed Book.
Gaya MLA
Zeilik, Michael & Gregory, Stephen A..
Introductory Astronomy & Astrophysics.
Fourth Edition
Amerika:
Cengage Learning,
1998.
Printed Book.
Gaya Turabian
Zeilik, Michael & Gregory, Stephen A..
Introductory Astronomy & Astrophysics.
Fourth Edition
Amerika:
Cengage Learning,
1998.
Printed Book.