Cita APA

Aleksandrov, P. S. 1., & Hilbert, D. (1961). Elementary concepts of topology. Dover.

Citación estilo Chicago

Aleksandrov, P. S. 1896-1982., and David Hilbert. Elementary Concepts of Topology. New York: Dover, 1961.

Cita MLA

Aleksandrov, P. S. 1896-1982., and David Hilbert. Elementary Concepts of Topology. New York: Dover, 1961.