Cita APA (7a ed.)

Pius XII, p. (1939). "L'Encyclique ""Summi Pontificatus"" Lettre Encyclique.". [editor no identificat].

Cita Chicago Style (17a ed.)

Pius XII, papa. "L'Encyclique ""Summi Pontificatus"" Lettre Encyclique.". Montréal: [editor no identificat], 1939.

Cita MLA (9a ed.)

Pius XII, papa. "L'Encyclique ""Summi Pontificatus"" Lettre Encyclique.". [editor no identificat], 1939.