Robinson, G. d. B. (1959). The foundations of geometry (4th edition.). University of Toronto Press.
Chicago-referens (17:e uppl.)Robinson, Gilbert de Beauregard. The Foundations of Geometry. 4th edition. Toronto: University of Toronto Press, 1959.
MLA-referens (8:e uppl.)Robinson, Gilbert de Beauregard. The Foundations of Geometry. 4th edition. University of Toronto Press, 1959.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.