Riddle, D. F. (1982). Analytic geometry (Third edition.). Wadsworth Publishing Company.
Citazione stile Chigago Style (17a edizione)Riddle, Douglas F. Analytic Geometry. Third edition. Belmont, California: Wadsworth Publishing Company, 1982.
Citatione MLA (9a ed.)Riddle, Douglas F. Analytic Geometry. Third edition. Wadsworth Publishing Company, 1982.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.