Wiriya Noothong และ Warinthorn Chavasiri. (2015) Allelopathic potential of leftover materials from sunflower helianthus Annuus L. Chulalongkorn University:ม.ป.ท.Wiriya Noothong และ Warinthorn Chavasiri. 2015. Allelopathic potential of leftover materials from sunflower helianthus Annuus L. ม.ป.ท.:Chulalongkorn University;Wiriya Noothong และ Warinthorn Chavasiri. Allelopathic potential of leftover materials from sunflower helianthus Annuus L. ม.ป.ท.:Chulalongkorn University, 2015. Print.