APA
Alva A. K., Keefer R. F., Sajwan K. S. & International Conference on the Biogeochemistry of Trace Elements (6th : 2001 : University of Guelph O. (2003). Chemistry of trace elements in fly ash. New York: Kluwer Academic, Plenum Publishers.
Chicago
Alva Ashok K, Keefer Robert F, Sajwan Kenneth S and International Conference on the Biogeochemistry of Trace Elements (6th : 2001 : University of Guelph Ontario). 2003. Chemistry of trace elements in fly ash. New York: Kluwer Academic, Plenum Publishers.
Harvard
Alva A. K., Keefer R. F., Sajwan K. S. and International Conference on the Biogeochemistry of Trace Elements (6th : 2001 : University of Guelph O. (2003). Chemistry of trace elements in fly ash. New York: Kluwer Academic, Plenum Publishers.
MLA
Alva Ashok K, Keefer Robert F, Sajwan Kenneth S and International Conference on the Biogeochemistry of Trace Elements (6th : 2001 : University of Guelph Ontario). Chemistry of trace elements in fly ash. New York: Kluwer Academic, Plenum Publishers. 2003.