Gaya APA
Astronomy Ed. 4. (1946).
New York:
D. Van Nortrand Company, Inc..
Gaya Chicago
Astronomy Ed. 4.
Ed. 4.
New York:
D. Van Nortrand Company, Inc.,
1946.
Text.
Gaya MLA
Astronomy Ed. 4.
Ed. 4.
New York:
D. Van Nortrand Company, Inc.,
1946.
Text.
Gaya Turabian
Astronomy Ed. 4.
New York:
D. Van Nortrand Company, Inc.,
1946.
Print.