Morse, J. M. (1991). Strategies for sampling. In J. M. Morse (Ed.), Qualitative nursing research: A contemporary dialogue (pp. 127-145). Newbury Park, CA: Sage.
2.
Morse, J. M. (1994). Designing qualitative research. In N. K. Denzin & Y. S. Lincoln (Eds.), Handbook of qualitative inquiry (pp. 220-235). Thousand Oaks, CA: Sage.