Cohen, L. W., & Ehrlich, G. (1963). The structure of the real number system. Van Nostrand.
Cita Chicago (17th ed.)Cohen, Leon W., i Gertrude Ehrlich. The Structure of the Real Number System. Princeton, N.J.: Van Nostrand, 1963.
Cita MLA (8th ed.)Cohen, Leon W., i Gertrude Ehrlich. The Structure of the Real Number System. Van Nostrand, 1963.
Atenció: Aquestes cites poden no estar 100% correctes.