Gaya APA
Kaufmann, William J.. (1977).
Astronomy the structure of the universe .
New York:
Macmillan.
Gaya Chicago
Kaufmann, William J..
Astronomy the structure of the universe.
New York:
Macmillan,
1977.
Text.
Gaya MLA
Kaufmann, William J..
Astronomy the structure of the universe.
New York:
Macmillan,
1977.
Text.
Gaya Turabian
Kaufmann, William J..
Astronomy the structure of the universe.
New York:
Macmillan,
1977.
Print.