Yusuf, I. M., Augustini, A., & Ruhimat, R. (2025). DOWNWARD VERTICAL COMMUNICATION IN IMPROVING SERVICE QUALITY AT WISMA BHIMA CAKTI KOPO. Gema Kampus IISIP YAPIS Biak, 20(1), 11 - 16. https://doi.org/10.52049/gemakampus.v20i1.457