Cita APA (7th ed.)

Pólya, G. (1957). How to solve it: A new aspect of mathematical method (2a. ed.). Princeton University.

Cita Chicago (17th ed.)

Pólya, George. How to Solve It: A New Aspect of Mathematical Method. 2a. ed. Princeton: Princeton University, 1957.

Cita MLA (9th ed.)

Pólya, George. How to Solve It: A New Aspect of Mathematical Method. 2a. ed. Princeton University, 1957.