Analytic geometry 
Riddle, Douglas F. 
 - 6th ed. 
 -  Cengage Learning Asia Pte Ltd.  2009 
 - xvii, 473 pages 
978-9-81265767-1
Geometry -- Analytic.
516.3 R543 2009
                        978-9-81265767-1
Geometry -- Analytic.
516.3 R543 2009