SPIEGEL M R, STEPHENS L S, . (2016). SCHAUMS OUTLINES OF STATISTICS. New Delhi: Tata Megraw -Hill Publishing Company.
SPIEGEL M R, STEPHENS L S, . 2016. SCHAUMS OUTLINES OF STATISTICS. New Delhi: Tata Megraw -Hill Publishing Company.
SPIEGEL M R, STEPHENS L S, . SCHAUMS OUTLINES OF STATISTICS. New Delhi: Tata Megraw -Hill Publishing Company. 2016.