Gaya APA
Astronomy : journey to the cosmic frontier. (2008).
New York:
[s.n.].
Gaya Chicago
Astronomy : journey to the cosmic frontier.
.
New York:
[s.n.],
2008.
Text.
Gaya MLA
Astronomy : journey to the cosmic frontier.
.
New York:
[s.n.],
2008.
Text.
Gaya Turabian
Astronomy : journey to the cosmic frontier.
New York:
[s.n.],
2008.
Print.