Turner, R. (1987). Thinkers of the Twenthieth century (2nd ed.). St. James Press.
Čikaški stil citiranja (17. izdanje)Turner, Roland. Thinkers of the Twenthieth Century. 2nd ed. Chicago : London: St. James Press, 1987.
MLA način citiranja (9. izdanje)Turner, Roland. Thinkers of the Twenthieth Century. 2nd ed. St. James Press, 1987.
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