Cita APA (7th ed.)
Earl, B. (1963). Groups and fields: A programmed unit in modern mathematics. McGraw-Hill.
Cita Chicago (17th ed.)
Earl, Boyd. Groups and Fields: A Programmed Unit in Modern Mathematics. New York: McGraw-Hill, 1963.
Cita MLA (9th ed.)
Earl, Boyd. Groups and Fields: A Programmed Unit in Modern Mathematics. McGraw-Hill, 1963.
Atenció: Aquestes cites poden no estar 100% correctes.