APA

Griffith E., . (1959). The american system of government. Estados Unidos: Frederick A. Praeger.

Chicago

Griffith Ernest, . 1959. The american system of government. Estados Unidos: Frederick A. Praeger.

Harvard

Griffith E., . (1959). The american system of government. Estados Unidos: Frederick A. Praeger.

MLA

Griffith Ernest, . The american system of government. Estados Unidos: Frederick A. Praeger. 1959.