Soelaksono, T., A. Sudiro, M. Rahayu, and S. Sudjatno. “ Innovation and Performance of the Company (a Study on Corporate Manufacturing Industry Group B Medium Sized Territory Gerbang Kertosusila”,. International Review of Management and Marketing, vol. 8, no. 2, Mar. 2018, pp. 22-32, https://econjournals.com/index.php/irmm/article/view/6035.