Sukapti, S.; Prananta, A. W.; Dasion, A. G. R. . Evaluation of the Usefulness of the CSR Program of Oil and Gas Companies in East Kalimantan on the Implementation of Accuracy, Suitability, and Usefulness. jppipa, pendidikan ipa, fisika, biologi, kimia 2023, 9, 9679-9686.