Polya, G., & Conway, J. H. (2014). How to solve it: A new aspect of mathematical method (New Princeton Science Library edition.). Princeton University Press.

Polya, G., and John H. Conway. How to Solve It: A New Aspect of Mathematical Method. New Princeton Science Library edition. Princeton: Princeton University Press, 2014.

Polya, G., and John H. Conway. How to Solve It: A New Aspect of Mathematical Method. New Princeton Science Library edition. Princeton University Press, 2014.