Kar, J. Analytical geometry of the conic sections (5th ed.). Standard law house.
Chicago-referens (17:e uppl.)Kar, J.M. Analytical Geometry of the Conic Sections. 5th ed. Delhi: Standard law house.
MLA-referens (8:e uppl.)Kar, J.M. Analytical Geometry of the Conic Sections. 5th ed. Standard law house.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.