Lua APA (7ú heag.)
Engel, J. F., & Norton, W. (1975). What's gone wrong with the harvest?: A communication strategy for the church and world evangelism. Academie Books.
Lua i Stíl Chicago (17ú heag.)
Engel, James F., agus Wilbert Norton. What's Gone Wrong with the Harvest?: A Communication Strategy for the Church and World Evangelism. Grand Rapids: Academie Books, 1975.
Lua MLA (9ú heag.)
Engel, James F., agus Wilbert Norton. What's Gone Wrong with the Harvest?: A Communication Strategy for the Church and World Evangelism. Academie Books, 1975.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.