diff --git a/src/model/reference_range.ts b/src/model/reference_range.ts
index f35eb46..6292041 100644
--- a/src/model/reference_range.ts
+++ b/src/model/reference_range.ts
@@ -2,6 +2,9 @@ import { ReferenceRange } from "entity";
 import { SelectQueryBuilder } from "typeorm";
 import CommonHelper from "../helpers/common";
 import { OrmHelper } from "../helpers/orm";
+import { ILogObj, Logger } from "tslog";
+
+const log: Logger<ILogObj> = new Logger({ name: "[ReferenceRangeModel]", type: "pretty" });
 
 export class ReferenceRangeModel {
 	static async list(filter: Record<string, any> = {}): Promise<SelectQueryBuilder<any>> {
@@ -16,7 +19,8 @@ export class ReferenceRangeModel {
 				}
 			});
 		}
-		
+		log.info("FILTER OBJ:", filter);         // ← log filter yang masuk
+		log.info("SQL:", query.getSql());
 		return query;
 	}
 }