There will be situations when a resource is lacking some or most of the information that is required to reference it.
In this case you will need to represent the resource as best as you can with the information at hand, this involves using substitution phrases in place of the information. A detailed explanation is available at the APA Style Blog.
A simplified version is available below and as a PDF file.
Remember to always check the detailed referencing information available on the specialist resource pages in this guide.
Referencing a journal article and missing either the volume or issue number?
[Adapted from How to Write an APA Style Reference When Information Is Missing. Copyright 2012 by The American Psychological Association. Adapted with permission]
Notes: