Elifson, K. W., Runyon, R. P., & Haber, A. (1990). Fundamentals of social statistics (Second edition.). McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Elifson, Kirk W., Richard P. Runyon, agus Audrey Haber. Fundamentals of Social Statistics. Second edition. New York: McGraw-Hill, 1990.
Lua MLA (8ú heag.)Elifson, Kirk W., et al. Fundamentals of Social Statistics. Second edition. McGraw-Hill, 1990.
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