APA (7e ed.) Bronvermelding
Engel, J. F., & Norton, W. (1975). What's gone wrong with the harvest?: A communication strategy for the church and world evangelism. Zondervan.
Chicago (17e ed.) Bronvermelding
Engel, James F., en Wilbert Norton. What's Gone Wrong with the Harvest?: A Communication Strategy for the Church and World Evangelism. Grand Rapids: Zondervan, 1975.
MLA (9e ed.) Bronvermelding
Engel, James F., en Wilbert Norton. What's Gone Wrong with the Harvest?: A Communication Strategy for the Church and World Evangelism. Zondervan, 1975.
Let op: Deze citaties zijn niet altijd 100% accuraat.