Thuntida Ngamkham และ Kamon Budsaba. (2009) Confidence intervals for a ratio of binomial proportions based on unbiased estimators. Faculty of Science and Technology, Thammasat University,:ม.ป.ท.Thuntida Ngamkham และ Kamon Budsaba. 2009. Confidence intervals for a ratio of binomial proportions based on unbiased estimators. ม.ป.ท.:Faculty of Science and Technology, Thammasat University,;Thuntida Ngamkham และ Kamon Budsaba. Confidence intervals for a ratio of binomial proportions based on unbiased estimators. ม.ป.ท.:Faculty of Science and Technology, Thammasat University, 2009. Print.