Levina, G., R. Naibaho, and K. Siburian. “TINJAUAN YURIDIS TERHADAP KASUS KARTEL MINYAK GORENG DI INDONESIA (STUDI PUTUSAN KPPU NOMOR 24/KPPU-1/2009)”. Jurnal Hukum PATIK, vol. 6, no. 3, Dec. 2017, pp. 229-40, https://ejournal.uhn.ac.id/index.php/patik/article/view/305.