APA (7th ed.) Citation

Catholic Church & Gasparri, P. (1920). Codex iuris canonici. Typis Polyglottis Vaticanis.

Chicago Style (17th ed.) Citation

Catholic Church and Pietro Gasparri. Codex Iuris Canonici. Romae: Typis Polyglottis Vaticanis, 1920.

MLA (8th ed.) Citation

Catholic Church and Pietro Gasparri. Codex Iuris Canonici. Typis Polyglottis Vaticanis, 1920.