APA-viite (7. p.)
Helmes, W. G. (1949). John A. Johnson, the people's governor: A political biography. University of Minnesota Press.
Chicago-viite (17. p.)
Helmes, Winifred G. John A. Johnson, the People's Governor: A Political Biography. Minneapolis: University of Minnesota Press, 1949.
MLA-viite (9. p.)
Helmes, Winifred G. John A. Johnson, the People's Governor: A Political Biography. University of Minnesota Press, 1949.
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