Dyfyniad APA

Forum of Mathematics, Sigma | Cambridge University Press. Cambridge University Press.

Dyfyniad Arddull Chicago

Forum of Mathematics, Sigma | Cambridge University Press. Cambridge University Press.

Dyfyniad MLA

Forum of Mathematics, Sigma | Cambridge University Press. Cambridge University Press.

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