Prommarat, P., K. Pratoom, and K. Muenthaisong. “Strategic Organizational Flexibility Capability and Business Survival: An Empirical Investigation of Tour Businesses in Thailand”. AU-GSB E-JOURNAL, vol. 9, no. 1, Jan. 2017, p. 61, http://www.assumptionjournal.au.edu/index.php/AU-GSB/article/view/2521.