This page reflects guidance from the sixth edition of the Publication Manual.
When do you include a retrieval date in a citation?
When a citation includes a digital object identifier (DOI), no further retrieval information is needed.
When a DOI is not available, and a URL is included, do not include retrieval dates unless the source material may change over time (e.g., wikis).
Last updated: August 2020Date created: May 2009