APA (7th ed.) Citation

Pontri︠a︡gin, L. S., & Lehmer, E. Topological groups. Princeton University Press.

Chicago Style (17th ed.) Citation

Pontri︠a︡gin, L. S., and Emma Lehmer. Topological Groups. Princeton: Princeton University Press.

MLA (9th ed.) Citation

Pontri︠a︡gin, L. S., and Emma Lehmer. Topological Groups. Princeton University Press.