APA (7th ed.) Citation

(1951). In litteras encyclicas "Humani generis" Pii PP. XII commentarium.

Chicago Style (17th ed.) Citation

In Litteras Encyclicas "Humani Generis" Pii PP. XII Commentarium. 1951.

MLA (9th ed.) Citation

In Litteras Encyclicas "Humani Generis" Pii PP. XII Commentarium. 1951.

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