APA (7th ed.) Citation

Ritchie & Lewis. (2003). Qualitative research practice: A guide for social science students and researchers. Sage Pub.

Chicago Style (17th ed.) Citation

Ritchie and Lewis. Qualitative Research Practice: A Guide for Social Science Students and Researchers. London: Sage Pub, 2003.

MLA (8th ed.) Citation

Ritchie and Lewis. Qualitative Research Practice: A Guide for Social Science Students and Researchers. Sage Pub, 2003.