You can search for articles related to a specific nursing theory or theorist by using the CINAHL Subject Headings search in the CINAHL database. Enter either the theory/model name or the theorist's last name in the search field. Helpful screenshots can be found on this third-party site: How do I find articles relating to a nursing theory or theorist?
For example:
More tips can be found on the Daemen Library "Nursing Theory" research guide. Note that this website contains links that won't open for SJSU users.
In Nursing Theory a Primary Source is:
Whereas a Secondary Source is: