Gaya APA
The World Almanac and Book of Facts 2001. (2001).
New Jersey:
World Almanac Books.
Gaya Chicago
The World Almanac and Book of Facts 2001.
.
New Jersey:
World Almanac Books,
2001.
Text Book.
Gaya MLA
The World Almanac and Book of Facts 2001.
.
New Jersey:
World Almanac Books,
2001.
Text Book.
Gaya Turabian
The World Almanac and Book of Facts 2001.
New Jersey:
World Almanac Books,
2001.
Text Book.