Engel, J. F., & H., W. (1978). What's gone wrong with the harvest? A communication strategy for the church and world evangelization. Zondervan.
Cita Chicago (17th ed.)Engel, James F., i Wilbertton H. What's Gone Wrong with the Harvest? A Communication Strategy for the Church and World Evangelization. Zondervan, 1978.
Cita MLA (9th ed.)Engel, James F., i Wilbertton H. What's Gone Wrong with the Harvest? A Communication Strategy for the Church and World Evangelization. Zondervan, 1978.
Atenció: Aquestes cites poden no estar 100% correctes.