Steel, R. G., & Torrie, J. H. (1980). Principles and procedures of statistics (2nd edition.). McGraw-Hill.
Cita Chicago Style (17a ed.)Steel, Robert G.D, y James H. Torrie. Principles and Procedures of Statistics. 2nd edition. New York: McGraw-Hill, 1980.
Cita MLA (8a ed.)Steel, Robert G.D, y James H. Torrie. Principles and Procedures of Statistics. 2nd edition. McGraw-Hill, 1980.
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