Cita APA (7th ed.)

Pólya, G. (1965). Mathematical discovery: George Pólya (Combined ed.). Wiley.

Cita Chicago (17th ed.)

Pólya, George. Mathematical Discovery: George Pólya. Combined ed. New York [u.a.]: Wiley, 1965.

Cita MLA (8th ed.)

Pólya, George. Mathematical Discovery: George Pólya. Combined ed. Wiley, 1965.