Doughty, W. E. (1912). The call of the world: Or, Every man's supreme opportunity. The Presbyterian department of missionary education.
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Chicago Style (17th ed.) Zitazioa
Doughty, William E. The Call of the World: Or, Every Man's Supreme Opportunity. New York city: The Presbyterian department of missionary education, 1912.
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MLA (9th ed.) Zitazioa
Doughty, William E. The Call of the World: Or, Every Man's Supreme Opportunity. The Presbyterian department of missionary education, 1912.
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Kontuz: berrikusi erreferentzia hauek erabili aurretik.