The DOI goes at the end of the citation. Notice that if there is a DOI, then the citation is the same regardless of whether the book has been accessed in print or online. For instructions on how to find the DOI of an item, click here.
Template:
Author, A. A. (Year). Title of book: Subtitle of book. doi:xx.xxxxxxxxxxxxx
Example:
Moghissia, H. (2013). Women, power and politics in 21st century Iran. doi: 10.1080/13552074.2013.767529