Should I add a DOI as well as a URL in my reference?

For all referencing styles used at Notre Dame Australia, you would use one of these "locators" for electronic resources, but never both.

Chicago Manual of Style, 18th edition and APA 7th edition

The DOI, e.g. 10.1177/0191453713494967 is appended to the prefix https://doi.org/ in order to form a URL, e.g. https://doi.org/10.1177/0191453713494967.