Gaya APA
Peter, C., Susan, C. (1990).
Latin America in the twentieth century / Peter Calvert, Susan Calvert .
:
The Macmillan Press.
Gaya MLA
Calvert, Peter., Calvert, Susan.
"Latin America in the twentieth century / Peter Calvert, Susan Calvert".
:
The Macmillan Press,
1990.
Textbook.