APA (7th ed.) Citation

Perugini, A. (1939). Habemus Papam Pium XII. Rome.

Chicago Style (17th ed.) Citation

Perugini, Angelus. Habemus Papam Pium XII. Rome, 1939.

MLA (8th ed.) Citation

Perugini, Angelus. Habemus Papam Pium XII. Rome, 1939.

Warning: These citations may not always be 100% accurate.