Tests & Measures

Best practice to cite a test or measure is to cite the original validating article. This is the article that tested the instrument and quantitatively determined its validity through scientific methods. This will be a peer-reviewed article. 

For more information about citation see the library's APA Style 7th edition guide

Here is an example from APA PsycTESTS: 

The bibliographic record for Major Depression Inventory provides the Source Citation. This is the validating article that should be cited: