Sanford, W. W. (2018). The Role of the Impractical. University of Ife Press.
Čikaški stil citiranja (17. izdanje)Sanford, William W. The Role of the Impractical. University of Ife Press, 2018.
MLA način citiranja (9. izdanje)Sanford, William W. The Role of the Impractical. University of Ife Press, 2018.
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