| Primary Sources | Secondary Sources |
| Psychological tests; studies (case studies, follow-up studies, longitudinal studies, treatment outcome studies); clinical case reports; experimental replications; findings from surveys and questionnaires; reports of social workers, psychiatrists, and lab technicians; interviews; oral histories; organizational records; artifacts; statistical data; field notes; site reports; fossils; photographs | Commentary and evaluations in reports, documents, journal articles, and books. |