APA (7th ed.) Citation

Pío II, . P. (1936). Epistola Circularis in Litteras encyclicas. Cuore di Maria.

Chicago Style (17th ed.) Citation

Pío II, Papa. Epistola Circularis in Litteras Encyclicas. Roma: Cuore di Maria, 1936.

MLA (9th ed.) Citation

Pío II, Papa. Epistola Circularis in Litteras Encyclicas. Cuore di Maria, 1936.

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