Παραπομπή σε μορφή APA (7η εκδ.)

Engel, J. F., & H., W. (1978). What's gone wrong with the harvest? A communication strategy for the church and world evangelization. Zondervan.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Engel, James F., και Wilbertton H. What's Gone Wrong with the Harvest? A Communication Strategy for the Church and World Evangelization. Zondervan, 1978.

Παραπομπή σε μορφή MLA (9th εκδ.)

Engel, James F., και Wilbertton H. What's Gone Wrong with the Harvest? A Communication Strategy for the Church and World Evangelization. Zondervan, 1978.