P. Sarakarn, P. Siewchaisakul, P. Pramual, N. Putthanachote, and D. Jumparway, “Analysis of Covariance (ANCOVA): Optimal Method for Analyzing Pre-post Data with Repeated Measures Two Groups under Experimental Design in Health Science Research”, Health Sci J Thai, vol. 6, no. 1, pp. 42–51, Jan. 2024.