^Southworth, Franklin C.
"upenn.edu profile page". University of Pennsylvania. Retrieved 25 March 2014.
^Franklin C. Southworth, David W. McAlpin (2013). "30 South Asia: Dravidian linguistic history". South Asia: Dravidian linguistic history. Blackwell Publishing Ltd.
doi:
10.1002/9781444351071.wbeghm830.
ISBN9781444334890.