How do you reference an article that's been published ahead of print?
You may find that an article you would like to cite is listed as an advance online publication, a preprint, or perhaps published online before print. These terms can be confusing, as different journals may have varying interpretations of what they mean: sometimes it's the complete article that is published electronically, which is the same that will shortly appear in the print journal. Sometimes it's an early edition of an article, which may be subjected to further review or refinements. Sometimes it's the complete article, and it will only appear as an online resource.
You are able to use these articles in your reference list, provided you include the author, date of the version you used, DOI, and the article and journal titles. You would also include a descriptive statement, depending on your referencing style. This could be the term 'forthcoming' or a phrase like 'advance online publication.'
For further details, refer to the specific referencing style in the University's Referencing Guide.