What is a DOI?

In the reference list

A DOI (digital object identifier) is a unique identification code that is assigned to electronic documents so that they are easy to find on the internet. Unlike URLs that can be changed or deleted, the DOI number is a permanent identification code that is always associated with the document. You can usually find the DOI number on the front page of electronic articles, near the copyright statement, or on the database landing page for the article. Books, articles, and datasets can have a DOI.

Example of DOI-number: 10.1177/1090198109343895

To find an article using the DOI number, enter the following URL followed by the DOI number: [ https://doi.org/ ].

Example: https://doi.org/10.1177/1090198109343895

In the reference, include https:// in front of the DOI number.