Cita APA (7th ed.)

Pólya, G. (1957). How to solve it: A new aspect of mathematical method. Doubleday.

Cita Chicago (17th ed.)

Pólya, George. How to Solve It: A New Aspect of Mathematical Method. New York: Doubleday, 1957.

Cita MLA (9th ed.)

Pólya, George. How to Solve It: A New Aspect of Mathematical Method. Doubleday, 1957.