Phopgao Buddharak และ Warut U-Kong. (2011) Effects of Thidiazuron (TDZ) และ 2, 4-Dichlorophenoxyacetec acid (2, 4-D) for Induced Callus and Shoots of Poodjeed (Tabernaemontana divaricate L.) in vitro Culture. <i>Thai Agricultural Research Journal</i>, <i>29</i>(2), 161-169.Phopgao Buddharak และ Warut U-Kong. "Effects of Thidiazuron (TDZ) และ 2, 4-Dichlorophenoxyacetec acid (2, 4-D) for Induced Callus and Shoots of Poodjeed (Tabernaemontana divaricate L.) in vitro Culture". Thai Agricultural Research Journal 29 (2011):161-169.Phopgao Buddharak และ Warut U-Kong. Effects of Thidiazuron (TDZ) และ 2, 4-Dichlorophenoxyacetec acid (2, 4-D) for Induced Callus and Shoots of Poodjeed (Tabernaemontana divaricate L.) in vitro Culture. Department of Agriculture:ม.ป.ท. 2011.