Greenberg, M. J. (1980). Euclidean and non-Euclidean geometries: Development and history (second edition.). W. H. Freeman and company.
Chicago-Zitierstil (17. Ausg.)Greenberg, Marvin J. Euclidean and Non-Euclidean Geometries: Development and History. second edition. San Francisco: W. H. Freeman and company, 1980.
MLA-Zitierstil (9. Ausg.)Greenberg, Marvin J. Euclidean and Non-Euclidean Geometries: Development and History. second edition. W. H. Freeman and company, 1980.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.