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Machin, D., & Thompson, R. (2004). What a PEST? PEST. Yet another business acronym. Like SWOT, USP, JIT and many others, you may be able to remember what PEST stands for, but do you really understand what it means? Business Review [UK], 10(4), 36+. Valuing a PEST analysis and what it can do for your organization.
Ho, J. K. K. (2014). Formulation of a systemic PEST analysis for strategic analysis. European academic research, 2(5), 6478-6492. An applied PEST analysis for strategic analysis.