APA استشهاد

Spiegel, M. R. (1972). Theory and problems of statistics. Mc Graw - Hill.

استشهاد بنمط شيكاغو

Spiegel, Murray R. Theory and Problems of Statistics. New York: Mc Graw - Hill, 1972.

MLA استشهاد

Spiegel, Murray R. Theory and Problems of Statistics. Mc Graw - Hill, 1972.