College geometry, Csaba Vincze and i-aszlo Kozina, 2014 Oxford University

(High School) SQA Advanced Higher Mathematics. Unit I. Ibis edition published in 2009 by Heriot-Watt University SCHOLAR. Copyright 2009 Heriot-Watt University.

7. 
   College geometry, Csaba Vincze and I-aszlo Kozina, 2014 Oxford University
   
8. 
   Introduction to Calculus, Volume Lil by J.H. Heinbockel Emeritus Professor of Mathematics Oki Dominion University, Copyright 2012. All rights reserved Paper or electronic copies for noncommercial use may be made freely without explicit.