What does 'doi' mean in the following book fererence?
what should we write after that?
Author, A. A. (if available). (Year). Title of entry. In Editor, B. B. (Ed.), Title of dictionary/encyclopedia.
(p. page number). doi:xxxxxxxxxxxxxxxx OR Retrieved from http://URL
Digital object identifier - Wikipedia, the free encyclopedia
It will be provided for you by the source. If it is not, do not include it in the reference.