APA (7e ed.) Bronvermelding
Welsh, R. E. (1908). The challenge to Christian missions: Missionary question and the modern mind. Young People's Missionary Movement.
Chicago (17e ed.) Bronvermelding
Welsh, R. E. The Challenge to Christian Missions: Missionary Question and the Modern Mind. New York: Young People's Missionary Movement, 1908.
MLA (9e ed.) Bronvermelding
Welsh, R. E. The Challenge to Christian Missions: Missionary Question and the Modern Mind. Young People's Missionary Movement, 1908.
Let op: Deze citaties zijn niet altijd 100% accuraat.