Singer, I. (1967). Lecture notes on elementary topology and: Geometry. Scott, Foresman.
Citazione stile Chigago Style (17a edizione)Singer, I.M. Lecture Notes on Elementary Topology and: Geometry. Glenview, Ill.: Scott, Foresman, 1967.
Citatione MLA (9a ed.)Singer, I.M. Lecture Notes on Elementary Topology and: Geometry. Scott, Foresman, 1967.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.