Dyfyniad APA

Polya, G., & Conway, J. H. (1985). How to solve it: A new aspect of mathematical method (2nd ed.). PHI.

Dyfyniad Arddull Chicago

Polya, George, and John Horton Conway. How to Solve It: A New Aspect of Mathematical Method. 2nd ed. New Delhi: PHI, 1985.

Dyfyniad MLA

Polya, George, and John Horton Conway. How to Solve It: A New Aspect of Mathematical Method. 2nd ed. PHI, 1985.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.