Sudaruk Leu. 1999. Determination of unclaimed prescriptions at outpatient department, Songklanagarind hospital. [Songkhla:Songkhlanakarin hospital];
Sudaruk Leu. (1999) Determination of unclaimed prescriptions at outpatient department, Songklanagarind hospital (รายงานผลงานวิจัย). Songkhlanakarin hospital]:[Songkhla.
Sudaruk Leu. Determination of unclaimed prescriptions at outpatient department, Songklanagarind hospital. [Songkhla:Songkhlanakarin hospital], 1999.
Sudaruk Leu. (1999) Determination of unclaimed prescriptions at outpatient department, Songklanagarind hospital (รายงานผลงานวิจัย). Songkhlanakarin hospital]:[Songkhla.