Gaya APA

Shenk, W, R. (1999). Changing frontiers of mission. Preface: Jonathan J. Bonk. . Maryknoll: Maryknoll Orbis Books.

Gaya MLA

Shenk, Wilbert, R.. "Changing frontiers of mission. Preface: Jonathan J. Bonk. ". Maryknoll: Maryknoll Orbis Books, 1999. Buku.