Ewing, J. H., & Gehring F W. (1991). Paul halmos celebrating 50 years of mathematics.
Chicago Edition CitationEwing, John H., and Gehring F W. Paul Halmos Celebrating 50 Years of Mathematics. Springer-Verlag, Berlin, 1991.
MLA Edition CitationEwing, John H., and Gehring F W. Paul Halmos Celebrating 50 Years of Mathematics. 1991.
Warning: These citations may not always be 100% accurate.