Parker, K. F., McCall, P. L., & Land, K. C. (1998). The Effects of Levels of Analysis on Inferences in Homicide Studies. In M. Dwayne & M. A. Zahn (Eds.), Homicide: A Sourcebook of Social Research (pp. 107–124). Thousand Oaks, CA: Sage Publications.

Parker, K. F., P. L. McCall, and K. C. Land. “The Effects of Levels of Analysis on Inferences in Homicide Studies.” In Homicide: A Sourcebook of Social Research, edited by M. Dwayne and M. A. Zahn, 107–24. Thousand Oaks, CA: Sage Publications, 1998.

Parker KF, McCall PL, Land KC. The Effects of Levels of Analysis on Inferences in Homicide Studies. In: Dwayne M, Zahn MA, editors. Homicide: A Sourcebook of Social Research. Thousand Oaks, CA: Sage Publications; 1998. p. 107–24.

Parker, K. F., et al. “The Effects of Levels of Analysis on Inferences in Homicide Studies.” Homicide: A Sourcebook of Social Research, edited by M. Dwayne and M. A. Zahn, Sage Publications, 1998, pp. 107–24.

Parker KF, McCall PL, Land KC. The Effects of Levels of Analysis on Inferences in Homicide Studies. In: Dwayne M, Zahn MA, editors. Homicide: A Sourcebook of Social Research. Thousand Oaks, CA: Sage Publications; 1998. p. 107–124.