APA (7th ed.) Citation

Halmos, P. R. (1991). Problems for mathematicians, young and old. Mathematical association of america.

Chicago Style (17th ed.) Citation

Halmos, Paul Richard. Problems for Mathematicians, Young and Old. Washington: Mathematical association of america, 1991.

MLA (9th ed.) Citation

Halmos, Paul Richard. Problems for Mathematicians, Young and Old. Mathematical association of america, 1991.

Warning: These citations may not always be 100% accurate.