"sources of identity" is a correct and usable phrase in written English.
It is generally used to refer to the different elements that contribute to an individual's sense of self. For example, "My sources of identity include my family, my religion, and my sense of humor."
It is also among the most important sources of identity and purpose in individuals' lives.
Here are the educated classes who aspire to the intellectual and material rewards of modern, global culture, but risk losing their traditional sources of identity and spiritual energy.
Not only does that make the defense of these countries more difficult, but it changes the sources of identity in ways that do not sustain ethno-national identity but rather promote a more cosmopolitan set of values.
The end of Britain's empire in the 1950s and 1960s, coupled with the gradual erosion of once-rigid class divides, have cast the country loose from the old anchors, and left many people in a restless search for new certainties, new sources of identity and pride.
A second problem was that by placing such an emphasis upon the gender of one's sexual partner(s), other possible important sources of identity are marginalized, such as race and ethnicity.
As these sources of identity, personal pride and satisfaction are lost, people with dementia can become deeply sad, fearful and/or angry.
It's a source of identity.
Culture – like religion and nation and race – provides a source of identity for contemporary human beings.
The pursuit of wealth is a real source of identity in America.
Young people in care can relate to that feeling of having a different source of identity from other people".
Now cuisine outstrips even Peru's Inca heritage as its main source of identity, and the plaudits are stacking up.
