Rujukan Racun_rumpai

  1. 1 2 Kellogg RL, Nehring R, Grube A, Goss DW, and Plotkin S (February 2000), Environmental indicators of pesticide leaching and runoff from farm fields. United States Department of Agriculture Natural Resources Conservation Service. Capain pada 4 Mac 2012.
  2. ↑ Gale E. Peterson (1967). "The Discovery and Development of 2,4-D". Agricultural History. 41 (3): 243–254. 

3. Homer M. LeBaron, Janis E. McFarland and Orvin C. Burnside, The Triazine Herbicides: 50 years Revolutionizing Agriculture,2008, ISBN: 978-0-444-51167-6

4. The History of Roundup http://roundup.ca/en/rounduphistory