| Primary Sources | Secondary Sources |
|---|---|
| Diaries | Biographical Works |
| Journal articles detailing original research | Books (except fiction & autobiographies) |
| Letters | Commentaries, criticisms |
| Newspaper articles written at the time | HIstories |
| Oral and video recordings | Journal articles (depending on the discipline these can be primary) |
| Photographs | Magazine and newspaper articles (this distinction varies by discipline) |
| Records of organizations, government agencies (e.g. annual reports, treaty, constitution) | |
| Speeches | |
| Survey Research (e.g. market surveys, public opinion polls) | |
| Works of art, architecture, literature, music | |
| Data, statistics, etc. |