Click titles below to view related graduate textbooks • Grinnell, R.M., Jr., & Unrau, Y.A. (Eds.). (2008). Social work research and evaluation (8th ed.). New York: Oxford University Press. • Weinbach, R.W., & Grinnell, R.M., Jr. (2007). Statistics for social workers (7th ed.). Boston: Allyn & Bacon. • Unrau, Y.A., Gabor, P.A., & Grinnell, R.M., Jr. (2007). Evaluation for social workers (4th ed.). New York: Oxford University Press.