Agrawal, O. P., Elsner, T. E., Robertson, J. S., Samples, J., & Wilson, J. T. (2009). The best test preparation for the GRE graduate record examination mathematics test (4th ed.). Research and Education Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAgrawal, Om Prakash, Thomas E. Elsner, John S. Robertson, Jerry Samples, और J. Terry Wilson. The Best Test Preparation for the GRE Graduate Record Examination Mathematics Test. 4th ed. Piscataway, N.J.: Research and Education Association, 2009.
एमएलए (8वां संस्करण) प्रशस्ति पत्रAgrawal, Om Prakash, et al. The Best Test Preparation for the GRE Graduate Record Examination Mathematics Test. 4th ed. Research and Education Association, 2009.
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