Riswan, Khaidir, Martha Fani Cahyandito, Aldrin Herwany, and Mokhamad Anwar. 2018. “The Investors’ Perspective on Investment Attractiveness of Oil and Gas Exploration Industry in Indonesia”. International Journal of Engineering & Technology 7 (4.15): 409-12. https://doi.org/10.14419/ijet.v7i4.15.23592.