Cita APA

Polya, G. 1., & Polya, G. 1. How to solve it: A new aspect of mathematical method (2. edition --.).

Citación estilo Chicago

Polya, George 1887-1985, y George 1887-1985 Polya. How to Solve It: A New Aspect of Mathematical Method. 2. edition --.

Cita MLA

Polya, George 1887-1985, y George 1887-1985 Polya. How to Solve It: A New Aspect of Mathematical Method. 2. edition --.