Tripetch Kanchanapoom. n.d. Studies on the chemical constituents of heterophragma sulfureum kurz. Khon Kaen:Khon Kaen University;
Tripetch Kanchanapoom. (n.d.) Studies on the chemical constituents of heterophragma sulfureum kurz (รายงานผลงานวิจัย). Khon Kaen University:Khon Kaen.
Tripetch Kanchanapoom. Studies on the chemical constituents of heterophragma sulfureum kurz. Khon Kaen:Khon Kaen University, n.d.
Tripetch Kanchanapoom. (n.d.) Studies on the chemical constituents of heterophragma sulfureum kurz (รายงานผลงานวิจัย). Khon Kaen University:Khon Kaen.