Cita APA (7th ed.)

Gemignani, M. C. (1990). Elementary topology (2a. ed.). Dover.

Cita Chicago (17th ed.)

Gemignani, Michael C. Elementary Topology. 2a. ed. Nueva York: Dover, 1990.

Cita MLA (9th ed.)

Gemignani, Michael C. Elementary Topology. 2a. ed. Dover, 1990.