Penus Leonard Roningsih Sinurat, Vivi Safira, and Melvany Agustini Sinurat, “Analysis of Determining the Leading Sectors of the Regional Economy of Labuhan Batu Regency: LQ and Shift Share Approach”, OJES, vol. 4, no. 1, pp. 42–53, Mar. 2025, doi: 10.61730/q8jvv015.