APA

Pío XII P., Chinigo M., . (1957). The Pope speaks. New York: Pantheon.

Chicago

Pío XII Papa, Chinigo Michael, . 1957. The Pope speaks. New York: Pantheon.

Harvard

Pío XII P., Chinigo M., . (1957). The Pope speaks. New York: Pantheon.

MLA

Pío XII Papa, Chinigo Michael, . The Pope speaks. New York: Pantheon. 1957.