BURRILL, C. E. (1967). Foundations of real ninbers. McGraw-Hill.
Cita Chicago (17th ed.)BURRILL, Claude E. Foundations of Real Ninbers. New York: McGraw-Hill, 1967.
Cita MLA (9th ed.)BURRILL, Claude E. Foundations of Real Ninbers. McGraw-Hill, 1967.
Atenció: Aquestes cites poden no estar 100% correctes.