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Naing, N. N. (2011). A practical guide on determination of sample size in health sciences research. Kelantan: Pustaka Aman Press.
APA: Arifin, W. N. (). Sample size calculator (web). Retrieved from http://wnarifin.github.io
Vancouver: Arifin WN. Sample size calculator (web) [Internet]. [cited ]. Available from: http://wnarifin.github.io
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