Robinson, G. d. B. (1959). The foundations of geometry (4th edition.). University of Toronto Press.
Chicago-viite (17. p.)Robinson, Gilbert de Beauregard. The Foundations of Geometry. 4th edition. Toronto: University of Toronto Press, 1959.
MLA-viite (8. p.)Robinson, Gilbert de Beauregard. The Foundations of Geometry. 4th edition. University of Toronto Press, 1959.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.