Phanwattana, Pitsarn. 2019. “The Antecedent of Buying Red-Whiskered Bulbul of The Birdmen for Contest”. KKU Research Journal (Graduate Studies) Humanities and Social Sciences 7 (1):12-24. https://so04.tci-thaijo.org/index.php/gskkuhs/article/view/189816.