How to Reuse & Attribute this Content (Primary)

© 2014 The Open University of Hong Kong. Textbook content produced by OUHK is licensed under a Creative Commons Attribution-ShareAlike 4.0 License.

Under this license, any user of this textbook or the textbook contents herein must provide proper attribution as follows: 

  • If you redistribute part of this textbook, you must retain in every digital format page view (including but not limited to EPUB, PDF, and HTML) and on every physical printed page the following attribution: 
    “Download for free at”