APA

Mortara G., . (1964). Characteristics of the demographic structure of the american countries. Estados Unidos: Pan American Union.

Chicago

Mortara Giorgio, . 1964. Characteristics of the demographic structure of the american countries. Estados Unidos: Pan American Union.

Harvard

Mortara G., . (1964). Characteristics of the demographic structure of the american countries. Estados Unidos: Pan American Union.

MLA

Mortara Giorgio, . Characteristics of the demographic structure of the american countries. Estados Unidos: Pan American Union. 1964.