Dyfyniad APA

Crossley,J.N, & Crossley, J. N. (1972). What is mathematical logic? Dover Publications.

Dyfyniad Arddull Chicago

Crossley,J.N, and John N. Crossley. What Is Mathematical Logic? New York: Dover Publications, 1972.

Dyfyniad MLA

Crossley,J.N, and John N. Crossley. What Is Mathematical Logic? Dover Publications, 1972.

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