Chalandakorn Reungprasertkit และผู้แต่งคนอื่นๆ. (2009) Efficacy of standardized extract of centella asiatica ECa 233 in the management of minor aphthous ulceration. Chulalongkorn University:ม.ป.ท.Chalandakorn Reungprasertkit และผู้แต่งคนอื่นๆ. 2009. Efficacy of standardized extract of centella asiatica ECa 233 in the management of minor aphthous ulceration. ม.ป.ท.:Chulalongkorn University;Chalandakorn Reungprasertkit และผู้แต่งคนอื่นๆ. Efficacy of standardized extract of centella asiatica ECa 233 in the management of minor aphthous ulceration. ม.ป.ท.:Chulalongkorn University, 2009. Print.