APA (7th ed.) Citation

(1920). Castel S. Angelo: Guida storica. Frank.

Chicago Style (17th ed.) Citation

Castel S. Angelo: Guida Storica. Roma: Frank, 1920.

MLA (9th ed.) Citation

Castel S. Angelo: Guida Storica. Frank, 1920.

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