Find 4 research articles: (A research article is written by authors who conduct

Find 4 research articles:
(A research article is written by authors who conducted an experiment or a series of experiments.)
2 articles on John Bowlby (one article in the 1970s and one recent 2010s)
2 articles on Sigmund Freud (one article in the 1970s and one recent 2010s)
Cite a Referense in APA:
-It needs to be in alphabetical order by last name of the first author.
-no bold.
-include DOI or URL

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