Doughty, W. E. (1912). The call of the world: Or Every man's supreme opportunity. Laymen's Missionary Movement.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDoughty, William Ellison. The Call of the World: Or Every Man's Supreme Opportunity. New York: Laymen's Missionary Movement, 1912.
एमएलए (9वां संस्करण) प्रशस्ति पत्रDoughty, William Ellison. The Call of the World: Or Every Man's Supreme Opportunity. Laymen's Missionary Movement, 1912.
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