J. Todd, B. Josephson, The design of living technologies for waste treatment / Ecological Engineering 6 (1996) 109-136 Water Hyacinth For Nutrient Removal, Orange County Water Conservation Department Orlando, Florida, 518.
Truy cập ngày 13 tháng 5 năm 2013.  ^ a ă J. Todd, B. Josephson, The design of living technologies for waste treatment / Ecological Engineering 6 (1996) 109-136 ^ Water Hyacinth For Nutrient Removal, Orange County Water Conservation Department Orlando, Florida, Wikispecies