APA استشهاد

Spiegel , M. . R. . .., & Stephens, L. J. . .. (1999). Theory and problems of statistics. Mac Graw Hill.

استشهاد بنمط شيكاغو

Spiegel , Murray R ., و Larry J. Stephens. Theory and Problems of Statistics. Boston: Mac Graw Hill, 1999.

MLA استشهاد

Spiegel , Murray R ., و Larry J. Stephens. Theory and Problems of Statistics. Mac Graw Hill, 1999.