Cita APA (7th ed.)
ebrary, Inc, & Pearl, E. (2007). Open problems in topology. Elsevier.
Cita Chicago (17th ed.)
ebrary, Inc, i Elliott Pearl. Open Problems in Topology. Amsterdam ; Oxford: Elsevier, 2007.
Cita MLA (9th ed.)
ebrary, Inc, i Elliott Pearl. Open Problems in Topology. Elsevier, 2007.
Atenció: Aquestes cites poden no estar 100% correctes.