Παραπομπή APA

Polya, G. (2014). How to solve it: A new aspect of mathematical method. Princeton University Press.

Παραπομπή Chicago Style

Polya, G. How to Solve It: A New Aspect of Mathematical Method. Princeton: Princeton University Press, 2014.

Παραπομπή MLA

Polya, G. How to Solve It: A New Aspect of Mathematical Method. Princeton University Press, 2014.