APA (7th ed.) Citation

Pontriagin, L. S. (1952). Foundations of combinatorial topology. Dover puplications.

Chicago Style (17th ed.) Citation

Pontriagin, L. S. Foundations of Combinatorial Topology. New York: Dover puplications, 1952.

MLA (8th ed.) Citation

Pontriagin, L. S. Foundations of Combinatorial Topology. Dover puplications, 1952.

Warning: These citations may not always be 100% accurate.