APA (7th ed.) Citation

Gaal, S. A. (2009). Point set topology (Dover ed.). Dover Publ.

Chicago Style (17th ed.) Citation

Gaal, Steven Alexander. Point Set Topology. Dover ed. Mineola, NY: Dover Publ, 2009.

MLA (9th ed.) Citation

Gaal, Steven Alexander. Point Set Topology. Dover ed. Dover Publ, 2009.