APA Style
OBELL, GEORGE O.. (1987).
EXPLORATION OF THE UNIVERSE (FIFTH ED.).
NEW YORK:
ALLYN BACON INC. , 1980.
Chicago Style
OBELL, GEORGE O..
EXPLORATION OF THE UNIVERSE.
FIFTH ED.
NEW YORK:
ALLYN BACON INC. , 1980,
1987.
Text.
MLA Style
OBELL, GEORGE O..
EXPLORATION OF THE UNIVERSE.
FIFTH ED.
NEW YORK:
ALLYN BACON INC. , 1980,
1987.
Text.
Turabian Style
OBELL, GEORGE O..
EXPLORATION OF THE UNIVERSE.
FIFTH ED.
NEW YORK:
ALLYN BACON INC. , 1980,
1987.
Print.