P., Nawiri M., Nyambaka H. N., and Mobegi E. 2017. “Levels of Polycyclic Aromatic Hydrocarbons in Water from Nairobi River, Nairobi County-Kenya”. The International Journal of Science & Technoledge 5 (5). http://internationaljournalcorner.com/index.php/theijst/article/view/123536.