Sumantri, Siswo Hadi, et al. “The Influence of Corporate Strategy, on Environmental Management Implications for Decision Making: A Survey of All Communities Affected by Landslides As Due to Environmental Damage in Nganjuk Regency”. International Review of Management and Marketing, vol. 9, no. 5, Sept. 2019, pp. 57-65, https://mail.econjournals.com/index.php/irmm/article/view/8552.