Igboamalu, C. and Ogaji, D. 2024. Knowledge, Attitude, and Practice of Patient Referral among Patent and Proprietary Medicine Vendors in Obio-Akpor, Rivers State. Nigerian Medical Journal. 65, 4 (Sep. 2024), 443–455. DOI:https://doi.org/10.60787/nmj.v65i4.417.