ANALISIS STRATEGI DIFERENSIASI DALAM PELAYANAN BEAUTY SPA & SPA BABY TERHADAP KEUNGGULAN BERSAING DI RSIA ERIA BUNDA PEKANBARU. kesmas [Internet]. 2018 Nov. 2 [cited 2024 Apr. 29];5(2):25-34. Available from: https://jurnal.ikta.ac.id/kesmas/article/view/93