Answer

DOI stands for Digital Object Identifier, which is a unique alphanumeric string attached to an article that has been published electronically. It looks like this:

 

10.1111/j.1542-734X.2011.00762.x

 

The 6th edition of the APA manual recommends using the DOI number instead of the location of the database. Therefore, an APA article citation would look like this:

 

Walker, L. J., Hennig, K. H., & Krettenauer, T. (2000) Parent and peer
       contexts for children's moral reasoning development. Child
       Development, 71, 1033-1048. doi:10.1111/1467-8624.00207

 

If the article does not list a DOI number, you can look up the DOI number using the free DOI lookup at http://www.crossref.org/guestquery/

 

If the article does not have an assigned doi number, use the old method of citing the name of the database.



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