SPIEGEL, M. R. (1992). Schaum's Outline Of Theory And Problems Of Statistics / Murray R. Spiegel. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)SPIEGEL, Murray R. Schaum's Outline Of Theory And Problems Of Statistics / Murray R. Spiegel. McGraw-Hill, 1992.
Lua MLA (8ú heag.)SPIEGEL, Murray R. Schaum's Outline Of Theory And Problems Of Statistics / Murray R. Spiegel. McGraw-Hill, 1992.
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