If an e-book is available from more than one publisher (on a different "platform"), cite the version you consulted. The following components need to be included:
Cite the e-book example shown on the right of this page in Vancouver Style.
Hint: Use the guide by K. Patrias (Citing Medicine: The NLM Style Guide for Authors, Editors and Publishers. 2nd ed. Bethesda, MD: National Library of Medicine, 2007 -) to help you with this exercise. the link is http://www.ncbi.nlm.nih.gov/books/NBK7269/#A53983. Please remember that WHSL does not require you to copy the example, but to rewrite it using the Vancouver style as shown in the examples given in this LibGuide. For instance, you do not need to show the type of medium.
In some e-books, there is a section at the top or bottom of the page, which says "How to Cite this Chapter". If such help exists, use it! Here is an example taken from Ganong's Review of Medical Physiology, Chapter 3. Immunity, Infection, & Inflammation.
How to Cite the Chapter
Barrett, KE, Barman SM, Boitano S, Brooks H, "Chapter 3. Immunity, Infection, & Inflammation" (Chapter). Barrett KE, Barman, SM, Boitano S, Brooks H: Ganong's Review of Medical Physiology, 23e: http://0-www.accessmedicine.com.innopac.wits.ac.za/content.aspx?aID=5242699.
The ONLY TIME it is permissible to "copy + paste" is when you copy the URL, as these are long, and you risk making a typing error if you try to retype the URL
Cite the e-book example shown above this box in Harvard Style.