Ulin, P. R., Robinson, E. T., & Tolley, E. E. (2005). Qualitative methods in public health: A field guide for applied research. Jossey-Bass.
Lua i Stíl Chicago (17ú heag.)Ulin, Priscilla R., Elizabeth T. Robinson, agus Elizabeth E. Tolley. Qualitative Methods in Public Health: A Field Guide for Applied Research. San Francisco, CA: Jossey-Bass, 2005.
Lua MLA (8ú heag.)Ulin, Priscilla R., et al. Qualitative Methods in Public Health: A Field Guide for Applied Research. Jossey-Bass, 2005.
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