APA-čujuhus (7. p.)
Earl, B. (1963). Groups and fields: A programmed unit in modern mathematics. McGraw-Hill.
Chicago-čujuhus (17. p.)
Earl, Boyd. Groups and Fields: A Programmed Unit in Modern Mathematics. New York: McGraw-Hill, 1963.
MLA-čujuhus (9. p.)
Earl, Boyd. Groups and Fields: A Programmed Unit in Modern Mathematics. McGraw-Hill, 1963.
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