Crossley,J.N, & Crossley, J. N. (1972). What is mathematical logic? Dover Publications.
Čikaški stil citiranjaCrossley,J.N, i John N. Crossley. What Is Mathematical Logic? New York: Dover Publications, 1972.
MLA način citiranjaCrossley,J.N, i John N. Crossley. What Is Mathematical Logic? Dover Publications, 1972.
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