Dyfyniad APA

Pontryagin, L. S. (1952). Foundations of combinatorial topology. Graylock Press.

Dyfyniad Arddull Chicago

Pontryagin, L. S. Foundations of Combinatorial Topology. Rochester, N.Y: Graylock Press, 1952.

Dyfyniad MLA

Pontryagin, L. S. Foundations of Combinatorial Topology. Graylock Press, 1952.

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