Sopon Uraichuen. 1993. Residual studies of profenofos and prothiofos insecticides in Chinese kale (Brassica alboglabra Bail.). Bangkok:Kasetsart University;
Sopon Uraichuen. (1993) Residual studies of profenofos and prothiofos insecticides in Chinese kale (Brassica alboglabra Bail.) (รายงานผลงานวิจัย). Kasetsart University:Bangkok.
Sopon Uraichuen. Residual studies of profenofos and prothiofos insecticides in Chinese kale (Brassica alboglabra Bail.). Bangkok:Kasetsart University, 1993.
Sopon Uraichuen. (1993) Residual studies of profenofos and prothiofos insecticides in Chinese kale (Brassica alboglabra Bail.) (รายงานผลงานวิจัย). Kasetsart University:Bangkok.