Cita APA

Halmos, P. R. 1. (1991). Problems for mathematicians, young and old. Mathematical Association of America.

Citación estilo Chicago

Halmos, Paul R. 1916-2006. Problems for Mathematicians, Young and Old. [Washington, D.C.]: Mathematical Association of America, 1991.

Cita MLA

Halmos, Paul R. 1916-2006. Problems for Mathematicians, Young and Old. [Washington, D.C.]: Mathematical Association of America, 1991.