APA (7 वां संस्करण) प्रशस्ति पत्र
Olson, C. G. (1989). What in the world is God doing?: The essentials of global missions : an introductory guide (5th ed.). Global Gospel Pub..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Olson, C. Gordon. What in the World Is God Doing?: The Essentials of Global Missions : An Introductory Guide. 5th ed. Cedar Knolls: Global Gospel Pub., 1989.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Olson, C. Gordon. What in the World Is God Doing?: The Essentials of Global Missions : An Introductory Guide. 5th ed. Global Gospel Pub., 1989.
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