Dolan, P., Donnelly, P., & Hogan, J. (2009). Approaches to qualitative research: Theory & its practical application : a guide for dissertation students. Oak Tree Press.

Dolan, Paddy, Paul Donnelly, and John Hogan. Approaches to Qualitative Research: Theory & Its Practical Application : A Guide for Dissertation Students. Cork: Oak Tree Press, 2009.

Dolan, Paddy, et al. Approaches to Qualitative Research: Theory & Its Practical Application : A Guide for Dissertation Students. Oak Tree Press, 2009.