Lua APA (7ú heag.)
Spiegel, M. R., & Stephens, L. J. (1992). Schaum's outline of theory and problems of statistics: SI units (2nd ed.). McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)
Spiegel, Murray R., agus Larry J. Stephens. Schaum's Outline of Theory and Problems of Statistics: SI Units. 2nd ed. New York: McGraw-Hill, 1992.
Lua MLA (9ú heag.)
Spiegel, Murray R., agus Larry J. Stephens. Schaum's Outline of Theory and Problems of Statistics: SI Units. 2nd ed. McGraw-Hill, 1992.
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