Halmos, P. R. (1991). Problems for mathematicians, young and old. Mathematical association of america.
Chicago Style (17th ed.) CitationHalmos, Paul Richard. Problems for Mathematicians, Young and Old. Washington: Mathematical association of america, 1991.
MLA (9th ed.) CitationHalmos, Paul Richard. Problems for Mathematicians, Young and Old. Mathematical association of america, 1991.