Gaya APA
Central and South America. (1981).
United States:
Grolier.
Gaya Chicago
Central and South America.
.
United States:
Grolier,
1981.
Text.
Gaya MLA
Central and South America.
.
United States:
Grolier,
1981.
Text.
Gaya Turabian
Central and South America.
United States:
Grolier,
1981.
Print.