Gaya APA
Grolier universal encyclopedia. (1970).
New York:
Grollier.
Gaya Chicago
Grolier universal encyclopedia.
.
New York:
Grollier,
1970.
Text.
Gaya MLA
Grolier universal encyclopedia.
.
New York:
Grollier,
1970.
Text.
Gaya Turabian
Grolier universal encyclopedia.
New York:
Grollier,
1970.
Print.