Date of Last Revision: February 2, 2012

User Licence

Materials produced by PrestoCentre are licensed under the Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/3.0/

Unless noted otherwise, you are free to share, copy, distribute and transmit works authored by PrestoCentre, under the following conditions: 

  • Attribution — You must attribute the work to PrestoCentre and the respective authors. 
  • Noncommercial — You may not use this work for commercial purposes. 
  • No Derivative Works — You may not alter, transform, or build upon this work without permission. 

Educational institutions may reproduce and distribute PrestoCentre materials for educational use provided attribution (credit)) and notification are given, the copyright notice is retained on any copies made and that the name of PrestoCentre not be used in advertising or publicity without specific prior written permission.  Commercial use of these materials may be allowed if you obtain prior written permission. Where we quote from articles originally published elsewhere, that content remains under its original copyright; see the original source for details in such cases. 

Disclaimer of Liability

While efforts will be made to ensure that the information on this site and its publications is accurate and up to date, PrestoCentre, its agents and employees are not liable for any loss or damage arising directly or indirectly from the possession, publication or use of or reliance on that information. It is provided "as is" without express or implied warranty.