APA

Bernhart J., . (1939). The Vatican as a world power. London, New York, etc: Longmans Green and co.

Chicago

Bernhart Joseph, . 1939. The Vatican as a world power. London, New York, etc: Longmans Green and co.

Harvard

Bernhart J., . (1939). The Vatican as a world power. London, New York, etc: Longmans Green and co.

MLA

Bernhart Joseph, . The Vatican as a world power. London, New York, etc: Longmans Green and co. 1939.