Leininger's Ethnonursing Research Method: Historical Retrospective and Overview.

A historical overview and evolution of Leininger's ethnonursing research method (ERM) is presented along with descriptions of the method's purpose, goal, terminology, and enablers. A succinct guide to using ERM is provided to assist novice and seasoned researchers, as well as mentors and educators, in teaching, mentoring, advising, and/or conducting ethnonursing research studies. Criteria for evaluation of qualitative research studies, such as the ERM, are highlighted.