Colombo Sacco, U. (1999). John Paul II and world politics: Twenty years of a search for a new approach, 1978-1998. Peeters.
Chicago Style (17th ed.) CitationColombo Sacco, Ugo. John Paul II and World Politics: Twenty Years of a Search for a New Approach, 1978-1998. Leuven, Belgium: Peeters, 1999.
MLA引文Colombo Sacco, Ugo. John Paul II and World Politics: Twenty Years of a Search for a New Approach, 1978-1998. Peeters, 1999.
警告:这些引文格式不一定是100%准确.