Gros, J., MacManus, E., & Riggs, A. (1998). Introduction to ecumenism. Paulist Press.
Chicago Style (17th ed.) CitationGros, Jeffrey, Eamon MacManus, and Ann Riggs. Introduction to Ecumenism. New York [u.a.]: Paulist Press, 1998.
MLA (9th ed.) CitationGros, Jeffrey, et al. Introduction to Ecumenism. Paulist Press, 1998.
Warning: These citations may not always be 100% accurate.