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Sudaruk Leu. 1994. The study of essential and non-essential drug utilization of out-patients in university hospital, central hospital and general hospital in Songkhla in 1993. Faculty of Graduate Studies, Mahidol University;
Sudaruk Leu. (1994) The study of essential and non-essential drug utilization of out-patients in university hospital, central hospital and general hospital in Songkhla in 1993 . Mahidol University/Bangkok.
Sudaruk Leu. The study of essential and non-essential drug utilization of out-patients in university hospital, central hospital and general hospital in Songkhla in 1993. . Bangkok:Mahidol University, 1994.
Sudaruk Leu. (1994) The study of essential and non-essential drug utilization of out-patients in university hospital, central hospital and general hospital in Songkhla in 1993 . Mahidol University/Bangkok.