- Census data
- Survey data (66)
Booth, Wayne C., et al. The Craft of Research. 4th ed., U of Chicago P, 2016
"Primary sources are the complete recorded findings of individual studies, sometimes found in monographs or scholarly journals" (52).
Northey, Margot, et al. Making Sense: A Student's Guide to Research and Writing: Social Sciences. 6th ed., Oxford UP, 2015