APA (7th ed.) Citation

Haffner, P. (1986). Discourses of the popes from Pius XI to John Paul II to the Pontifical Academy of Sciences: 1936 - 1986. Pontificiae Academiae Scientiarum scripta varia.

Chicago Style (17th ed.) Citation

Haffner, Paul. "Discourses of the Popes from Pius XI to John Paul II to the Pontifical Academy of Sciences: 1936 - 1986." Pontificiae Academiae Scientiarum Scripta Varia 1986.

MLA (9th ed.) Citation

Haffner, Paul. "Discourses of the Popes from Pius XI to John Paul II to the Pontifical Academy of Sciences: 1936 - 1986." Pontificiae Academiae Scientiarum Scripta Varia, 1986.

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