Gaya APA
Sagan, Carl. (1985).
Comet (text).
New York:
Random House.
Gaya Chicago
Sagan, Carl.
Comet.
text
New York:
Random House,
1985.
Tesis.
Gaya MLA
Sagan, Carl.
Comet.
text
New York:
Random House,
1985.
Tesis.
Gaya Turabian
Sagan, Carl.
Comet.
text
New York:
Random House,
1985.
Tesis.