Cita APA (7a ed.)

Polya, G. (1957). How to solve it: A new aspect of mathematical methods. Doubleday Anchor Books.

Cita Chicago Style (17a ed.)

Polya, G. How to Solve It: A New Aspect of Mathematical Methods. New York: Doubleday Anchor Books, 1957.

Cita MLA (8a ed.)

Polya, G. How to Solve It: A New Aspect of Mathematical Methods. Doubleday Anchor Books, 1957.