Lipschutz, S. (1981). Schaum's outline of theory and problems of general topology (SI metric ed.). McGraw-Hill.
Cita Chicago (17th ed.)Lipschutz, Seymour. Schaum's Outline of Theory and Problems of General Topology. SI metric ed. Singapore: McGraw-Hill, 1981.
Cita MLA (9th ed.)Lipschutz, Seymour. Schaum's Outline of Theory and Problems of General Topology. SI metric ed. McGraw-Hill, 1981.
Atenció: Aquestes cites poden no estar 100% correctes.