NOTE: Include a DOI for all works that have a DOI, regardless of whether you used the online version or the print version.
When adding the DOI to a reference, APA requires you include the prefix https://doi.org/ followed by the DOI (starting with 10. and everything that follows). You may have to change the format of DOIs you retrieve in your research to comply with APA's rules. (APA 7, 9.35 ). See the example below:
Dills, A. K., Morgan, H. N., & Rotthoff, K. W. (2011). Recess, physical education,
and elementary school student outcomes. Economics of Education Review, 30(5),
889-900. https://doi.org/10.1016/j.econedurev.2011.04.011