Gaya APA
SAGAN, CARL. (1972).
Planets (Ed. 1).
Amerika:
Time-Life.
Gaya Chicago
SAGAN, CARL.
Planets.
Ed. 1
Amerika:
Time-Life,
1972.
Text.
Gaya MLA
SAGAN, CARL.
Planets.
Ed. 1
Amerika:
Time-Life,
1972.
Text.
Gaya Turabian
SAGAN, CARL.
Planets.
Ed. 1
Amerika:
Time-Life,
1972.
Print.