Gaya APA
The World's Population: Young Geographer. (1993).
New York:
Thomson Learning.
Gaya Chicago
The World's Population: Young Geographer.
1.
New York:
Thomson Learning,
1993.
Buku.
Gaya MLA
The World's Population: Young Geographer.
1.
New York:
Thomson Learning,
1993.
Buku.
Gaya Turabian
The World's Population: Young Geographer.
New York:
Thomson Learning,
1993.
Buku.