What is a DOI?
Some databases and online journals include DOI (Digital Object Identifier) numbers within the record for each article. DOIs are unique numbers assigned to digital objects that will not change over time. They provide a persistent link to an article, allowing it to be found even if the URL changes. DOIs are usually found in the abstract or table of contents, at the top or bottom of an article.
See the MLA and APA style guides for instructions on citing online journal articles with DOIs.
To use the DOI to find a document follow these steps:
Add the DOI prefix to the DOI number http://dx.doi.org/