Lipschutz, S. (1965). General Topology (2nd ed.). McGraw-Hill.
Cita Chicago (17th ed.)Lipschutz, Seymour. General Topology. 2nd ed. New York: McGraw-Hill, 1965.
Cita MLA (9th ed.)Lipschutz, Seymour. General Topology. 2nd ed. McGraw-Hill, 1965.
Atenció: Aquestes cites poden no estar 100% correctes.