Gunawan Sagala, et al. “TRANSPORTATION METHODS TO OPTIMIZE SHIPPING COSTS FOR RESEARCH SOIL SAMPLES FOR STUDENTS OF THE FACULTY OF AGRICULTURE, INDONESIAN METHODIST UNIVERSITY”. INTERNATIONAL JOURNAL OF ADVANCED ACADEMIC , vol. 1, no. 02, Oct. 2024, pp. 55-59, doi:10.3951.vol1iss2no06pp55.