Engstrom, T. W. (1978). What in the world is God doing?: The new face of missions. Word Books Publisher.
Citazione stile Chigago Style (17a edizione)Engstrom, Ted W. What in the World Is God Doing?: The New Face of Missions. Waco, Tex: Word Books Publisher, 1978.
Citatione MLA (8a ed.)Engstrom, Ted W. What in the World Is God Doing?: The New Face of Missions. Word Books Publisher, 1978.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.