Apinya Ekpong. 2006. The development of an optimisation process in product development of mango gel snacks. Faculty of Technology, Khon Kaen University;
Apinya Ekpong. (2006) The development of an optimisation process in product development of mango gel snacks . Khon Kaen University/Khon Kaen.
Apinya Ekpong. The development of an optimisation process in product development of mango gel snacks. . Khon Kaen:Khon Kaen University, 2006.
Apinya Ekpong. (2006) The development of an optimisation process in product development of mango gel snacks . Khon Kaen University/Khon Kaen.