Putra, Adetiya Prananda, et al. “COMPETITIVE STRATEGY OF A MARKET LEADER; CASE OF UD. PRIMADONA’S PROL TAPE JEMBER - EAST JAVA”. Indonesian Journal of Business and Entrepreneurship, vol. 1, no. 3, Sept. 2015, p. 127, https://doi.org/10.17358/ijbe.1.3.127.