Schroeder-Lein. Treasures of the Abraham Lincoln Presidential Library. Southern Illinois University Press.
Čikaški stil citiranja (17. izdanje)Schroeder-Lein. Treasures of the Abraham Lincoln Presidential Library. Southern Illinois University Press.
MLA način citiranja (9. izdanje)Schroeder-Lein. Treasures of the Abraham Lincoln Presidential Library. Southern Illinois University Press.
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