Astuti, Ratnaningsih Dewi, Sarmalina Simamora, , Tedi, and Muhamad Taswin. 2022. “Formulation and Evaluation of Patch Preparations for Respiratory Relief from a Blend of Extracts and Essential Oils of Ginger Rhizome”. Journal of Drug Delivery and Therapeutics 12 (4): 64-67. https://doi.org/10.22270/jddt.v12i4.5448.