Citazione APA

Polya, G. (1971). How to solve it: A new aspect of mathematical method. Princeton University Press.

Stile di citazione Chicago

Polya, George. How to Solve It: A New Aspect of Mathematical Method. Princeton, N.J.: Princeton University Press, 1971.

Citazione MLA

Polya, George. How to Solve It: A New Aspect of Mathematical Method. Princeton University Press, 1971.