Chapter 4, “Concepts,” from Becker, H.S. Tricks of the Trade: How to Think about Your Research While You’re Doing It. Chicago: University of Chicago Press, 1998.
Vitalis, Robert. “The Past Is Another Country.” In A Handbook for Social Science Field Research, edited by Ellen Perecman and Sara R. Curran, 5–17. Thousand Oaks, CA: SAGE Publications, 2006.