In the humanities, a primary source could be defined as something that was created either during the time period being studied or afterward by individuals reflecting on their involvement in the events of that time.
Try a keyword search in the library catalogue combining your subject with words that identify a particular genre:
Each discipline taught at UBC is represented by a Library Research guide. The guides describe and link to the best sources for your research - including collections which contain significant numbers of primary sources in the Humanities. Click the "Arts & Humanities" link to bring up the research guides for these topic areas.