Cooper, H. M. (2004). Meta-analysis. In M. Lewis-Beck, A. Bryman, & T. F. Liao (Eds.), The SAGE Encyclopedia of Social Science Research Methods (Vol. 2, pp. 635–639). SAGE.

Cooper, H. M. “Meta-analysis.” In The SAGE Encyclopedia of Social Science Research Methods, edited by M. Lewis-Beck, A. Bryman, and T. F. Liao, 2:635–39. SAGE, 2004.

Cooper HM. Meta-analysis. In: Lewis-Beck M, Bryman A, Liao TF, editors. The SAGE Encyclopedia of Social Science Research Methods. SAGE; 2004. p. 635–9.

Cooper, H. M. “Meta-analysis.” The SAGE Encyclopedia of Social Science Research Methods, edited by M. Lewis-Beck et al., vol. 2, SAGE, 2004, pp. 635–39.

Cooper HM. Meta-analysis. In: Lewis-Beck M, Bryman A, Liao TF, editors. The SAGE Encyclopedia of Social Science Research Methods. SAGE; 2004. p. 635–639.