APA (7th ed.) Citation

Halmos, P. R. (1991). Problems for mathematicians, young and old. The Mathematical Association of America.

Chicago Style (17th ed.) Citation

Halmos, Paul R. Problems for Mathematicians, Young and Old. [S.l.]: The Mathematical Association of America, 1991.

MLA (8th ed.) Citation

Halmos, Paul R. Problems for Mathematicians, Young and Old. The Mathematical Association of America, 1991.

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