APA-referens (7:e uppl.)
Doughty, W. E. (1912). The call of the world: Or, Every man's supreme opportunity. The Presbyterian department of missionary education.
Chicago-referens (17:e uppl.)
Doughty, William E. The Call of the World: Or, Every Man's Supreme Opportunity. New York city: The Presbyterian department of missionary education, 1912.
MLA-referens (9:e uppl.)
Doughty, William E. The Call of the World: Or, Every Man's Supreme Opportunity. The Presbyterian department of missionary education, 1912.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.