Bevans, Stephen B., and Roger Schroeder. Constants in Context: A Theology of Mission for Today American Society of Missiology Series ; No. 30. Maryknoll, NY: Orbis Books, 2004.
Stephen Bevans is Louis J. Luzbetak, S.V.D., Professor of Mission and Culture. He is a Roman Catholic priest in the Society of the Divine Word, an international missionary congregation, and served for nine years (1972-1981) as a missionary in the Philippines. He has been on the CTU faculty for 26 years.
Roger Schroeder was ordained in 1979 as a member of the Society of the Divine Word (S.V.D.) after which he worked as a missionary for six years in Papua New Guinea. Upon earning a Doctorate in Missiology from the Pontifical Gregorian University in Rome, Schroeder began teaching at Catholic Theological Union. He has been at CTU since 1990.