Pheiffer, W., R. Pieters, L.P. Quinn, and N.J. Smit. 2014. “Polycyclic Aromatic Hydrocarbons (PAHs) in the Aquatic Ecosystems of Soweto and Lenasia”. Suid-Afrikaans Tydskrif Vir Natuurwetenskap En Tegnologie / <i>South African Journal of Science and Technology</I&gt; 33 (1), 1 bladsy. https://doi.org/10.4102/satnt.v33i1.1204.