Gaya APA
Population. ().
New York:
Macmillan Publishing Co,Inc.
Gaya Chicago
Population.
Thrid Edition.
New York:
Macmillan Publishing Co,Inc,
.
Text.
Gaya MLA
Population.
Thrid Edition.
New York:
Macmillan Publishing Co,Inc,
.
Text.
Gaya Turabian
Population.
New York:
Macmillan Publishing Co,Inc,
.
Print.