APA (7th ed.) Citation

Somekh, B., & Lewin, C. (2011). Theory and methods in social research (2nd ed.). Sage.

Chicago Style (17th ed.) Citation

Somekh, Bridget, and Cathy Lewin. Theory and Methods in Social Research. 2nd ed. Los Angeles, Calif: Sage, 2011.

MLA (9th ed.) Citation

Somekh, Bridget, and Cathy Lewin. Theory and Methods in Social Research. 2nd ed. Sage, 2011.