Thamonwan Lachai. (2019) The development of marketing mix strategies for natural tourismin Phetchabun province. <i>Journal of Management Science Nakhon Pathom Rajabhat University</i>, <i>6</i>(1), 183-196.Thamonwan Lachai. "The development of marketing mix strategies for natural tourismin Phetchabun province". Journal of Management Science Nakhon Pathom Rajabhat University 6 (2019):183-196.Thamonwan Lachai. The development of marketing mix strategies for natural tourismin Phetchabun province. Faculty of Management Science Nakhon Pathom Rajabhat University:ม.ป.ท. 2019.