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MLA

Ford, Barry L, et al. "Missing Data Procedures : a Comparative Study." ,

APA

Ford, B. L, United States, U. States, Department of Agriculture, D. of Agriculture, Statistical Reporting Service, S. Reporting Service, Research Division, R. Division, & Sample Survey Research Branch, S. Survey Research Branch. (1976). Missing data procedures : a comparative study.

Chicago

Ford, Barry L., United States, Department of Agriculture, Statistical Reporting Service, Research Division, and Sample Survey Research Branch. "Missing data procedures : a comparative study" (1976):