Pheravut Wongsawad และ Yuwadee Peerapornpisal. (2013) Ecological Relevance and Physical Morphology of Green Algae, Spirogyra sp. in Northern Thailand. <i>Journal of Yala Rajabhat University</i>, <i>8</i>(1), 1-8.Pheravut Wongsawad และ Yuwadee Peerapornpisal. "Ecological Relevance and Physical Morphology of Green Algae, Spirogyra sp. in Northern Thailand". Journal of Yala Rajabhat University 8 (2013):1-8.Pheravut Wongsawad และ Yuwadee Peerapornpisal. Ecological Relevance and Physical Morphology of Green Algae, Spirogyra sp. in Northern Thailand. Yala Rajabhat University:ม.ป.ท. 2013.