APA Style
SAGAN, CARL. (1985).
C O M E T .
NEWYORK:
NEW YORK , MC GRAW - HILL, 1990.
Chicago Style
SAGAN, CARL.
C O M E T.
NEWYORK:
NEW YORK , MC GRAW - HILL, 1990,
1985.
Text.
MLA Style
SAGAN, CARL.
C O M E T.
NEWYORK:
NEW YORK , MC GRAW - HILL, 1990,
1985.
Text.
Turabian Style
SAGAN, CARL.
C O M E T.
NEWYORK:
NEW YORK , MC GRAW - HILL, 1990,
1985.
Print.