Engel, J. F., & H., W. (1978). What's gone wrong with the harvest? A communication strategy for the church and world evangelization. Zondervan.
Citazione stile Chigago Style (17a edizione)Engel, James F., e Wilbertton H. What's Gone Wrong with the Harvest? A Communication Strategy for the Church and World Evangelization. Zondervan, 1978.
Citatione MLA (9a ed.)Engel, James F., e Wilbertton H. What's Gone Wrong with the Harvest? A Communication Strategy for the Church and World Evangelization. Zondervan, 1978.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.