Tran Phi Hoang, Nguyen Minh Tuan, Vo Huu Khanh, Le Minh Duc, The Impact of Perceived Value to the Purchasing Decisions of Consumers for Natural Cosmetic Products: A Study on “M White” Natural Cosmetic Brands of D.O PRO Joint Stock Company in Vietnam, American Based Research Journal 12(2016):25-33 DOI: 10.5281/zenodo.3441935