Cita APA (7a ed.)

Colombo Sacco, U. (1999). John Paul II and world politics: Twenty years of search for a new approach 1978-1998. Peeters.

Cita Chicago Style (17a ed.)

Colombo Sacco, Ugo. John Paul II and World Politics: Twenty Years of Search for a New Approach 1978-1998. Leuven: Peeters, 1999.

Cita MLA (9a ed.)

Colombo Sacco, Ugo. John Paul II and World Politics: Twenty Years of Search for a New Approach 1978-1998. Peeters, 1999.