Nattakorn Puengyen และ Warinthorn Chavasiri. (2005) Promotion of adventitious root growth by coffee extracts. Chulalongkorn University:ม.ป.ท.Nattakorn Puengyen และ Warinthorn Chavasiri. 2005. Promotion of adventitious root growth by coffee extracts. ม.ป.ท.:Chulalongkorn University;Nattakorn Puengyen และ Warinthorn Chavasiri. Promotion of adventitious root growth by coffee extracts. ม.ป.ท.:Chulalongkorn University, 2005. Print.