APA (7th ed.) Citation

Pontriagin, L. S. (1999). Foundations of combinatorial topology. Dover Publications.

Chicago Style (17th ed.) Citation

Pontriagin, L. S. Foundations of Combinatorial Topology. Mineola, N.Y.: Dover Publications, 1999.

MLA (8th ed.) Citation

Pontriagin, L. S. Foundations of Combinatorial Topology. Dover Publications, 1999.

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