Gaya APA
Collier's Encyclopedia. (1961).
New York:
The Crowell-Collier Publishing Company.
Gaya Chicago
Collier's Encyclopedia.
20.
New York:
The Crowell-Collier Publishing Company,
1961.
.
Gaya MLA
Collier's Encyclopedia.
20.
New York:
The Crowell-Collier Publishing Company,
1961.
.
Gaya Turabian
Collier's Encyclopedia.
New York:
The Crowell-Collier Publishing Company,
1961.
.