Cita APA (7a ed.)

Polya, G. (1988). How to solve it: A new aspect of mathematical method (2nd ed.). University.

Cita Chicago Style (17a ed.)

Polya, George. How to Solve It: A New Aspect of Mathematical Method. 2nd ed. Princeton: University, 1988.

Cita MLA (8a ed.)

Polya, George. How to Solve It: A New Aspect of Mathematical Method. 2nd ed. University, 1988.