Cooper, H. M., Valentine, J. C., & Charlton, K. (2000). The methodology of meta-analysis. In R. Gersten, E. Schiller, & S. Vaughn (Eds.), Contemporary Special Education Research Syntheses of the Knowledge Base on Critical Instructional Issues. Routledge.

Cooper, H. M., J. C. Valentine, and K. Charlton. “The methodology of meta-analysis.” In Contemporary Special Education Research Syntheses of the Knowledge Base on Critical Instructional Issues, edited by R. Gersten, E. Schiller, and S. Vaughn. Routledge, 2000.

Cooper HM, Valentine JC, Charlton K. The methodology of meta-analysis. In: Gersten R, Schiller E, Vaughn S, editors. Contemporary Special Education Research Syntheses of the Knowledge Base on Critical Instructional Issues. Routledge; 2000.

Cooper, H. M., et al. “The methodology of meta-analysis.” Contemporary Special Education Research Syntheses of the Knowledge Base on Critical Instructional Issues, edited by R. Gersten et al., Routledge, 2000.

Cooper HM, Valentine JC, Charlton K. The methodology of meta-analysis. In: Gersten R, Schiller E, Vaughn S, editors. Contemporary Special Education Research Syntheses of the Knowledge Base on Critical Instructional Issues. Routledge; 2000.