Gaya APA
Palen,Stacey. (2002).
Astronomy .
New York:
Mc-Graw Hill.
Gaya Chicago
Palen,Stacey.
Astronomy.
New York:
Mc-Graw Hill,
2002.
Text.
Gaya MLA
Palen,Stacey.
Astronomy.
New York:
Mc-Graw Hill,
2002.
Text.
Gaya Turabian
Palen,Stacey.
Astronomy.
New York:
Mc-Graw Hill,
2002.
Print.