| Primary |
Original materials or evidence directly related to the topic being studied, created by witnesses or first recorders of an event in the past. |
Diaries, speeches, original research, historical documents, photographs, and artifacts. |
| Secondary |
Materials that interpret, analyze, or summarize primary resources. |
Textbooks, articles, reviews, and biographies. |
| Tertiary/Reference |
Resources that compile, digest, or summarize information from primary and secondary sources. |
Encyclopedias, dictionaries, handbooks, and almanacs. |
