Cook, H. R. (1959). Missionary life and work: A discussion of principles and practices of missions. Moody Press.
Lua i Stíl Chicago (17ú heag.)Cook, Harold R. Missionary Life and Work: A Discussion of Principles and Practices of Missions. Chicago: Moody Press, 1959.
Lua MLA (8ú heag.)Cook, Harold R. Missionary Life and Work: A Discussion of Principles and Practices of Missions. Moody Press, 1959.
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