Cita APA (7a ed.)

Haffner, P. (1986). Discourses of the Popes from Pius XI to John Paul II to the Pontifical Academy of Sciences: 1936-1986. Pontificia Academia Scientiarum.

Cita Chicago Style (17a ed.)

Haffner, Paul. Discourses of the Popes from Pius XI to John Paul II to the Pontifical Academy of Sciences: 1936-1986. Città del Vaticano: Pontificia Academia Scientiarum, 1986.

Cita MLA (9a ed.)

Haffner, Paul. Discourses of the Popes from Pius XI to John Paul II to the Pontifical Academy of Sciences: 1936-1986. Pontificia Academia Scientiarum, 1986.