Marks, R. W. (1966). Simplifying set theory: A programmed text (Bantam unifact edition.). Bantam Books.
Chicago-viite (17. p.)Marks, Rober W. Simplifying Set Theory: A Programmed Text. Bantam unifact edition. Toronto: Bantam Books, 1966.
MLA-viite (9. p.)Marks, Rober W. Simplifying Set Theory: A Programmed Text. Bantam unifact edition. Bantam Books, 1966.
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