APA Style
Sagan, Earl (dan Jonathan Norton Leonard). (1969).
Planets (-).
New York:
New York: Time-Life Books,.
Chicago Style
Sagan, Earl (dan Jonathan Norton Leonard).
Planets.
-
New York:
New York: Time-Life Books,,
1969.
Universitas.
MLA Style
Sagan, Earl (dan Jonathan Norton Leonard).
Planets.
-
New York:
New York: Time-Life Books,,
1969.
Universitas.
Turabian Style
Sagan, Earl (dan Jonathan Norton Leonard).
Planets.
-
New York:
New York: Time-Life Books,,
1969.
Universitas.