Corbin, J. M., & Strauss, A. L. (2015). Basics of qualitative research: Techniques and procedures for developing grounded theory (Fourth edition.). SAGE.

Corbin, Juliet M., and Anselm L. Strauss. Basics of Qualitative Research: Techniques and Procedures for Developing Grounded Theory. Fourth edition. Los Angeles: SAGE, 2015.

Corbin, Juliet M., and Anselm L. Strauss. Basics of Qualitative Research: Techniques and Procedures for Developing Grounded Theory. Fourth edition. SAGE, 2015.