Chapter 4

Christensen, L. B., Johnson, R. B., & Turner, L. A. (2010). Research methods, design, and analysis. (11th ed., pp. 1-560). Boston, MA: Allyn and Bacon.

Angrosino, M. V. (2007). Naturalistic observation. (pp. 1-144). Walnut Creek, CA: Left Coast Press.

Maxwell, S. E., & Delaney, H. D. (2003). Designing experiments and analyzing data: A model comparison perspective. (2nd ed., pp. 1-1104). New York, NY: Routledge.