^Olson, James Stuart (1998). An Ethnohistorical Dictionary of China. Greenwood Publishing Group. p. 177. ISBN978-0-313-28853-1. The Kho people are the most important ethnic group in the Chitral region of northern Pakistan. They are an Indo-Aryan people who are Muslims, primarily Sunnis of the Hanafi tradition.
^O'Leary, Clare F.; Rensch, Calvin Ross; Decker, Sandra J. (1992). Sociolinguistic Survey of Northern Pakistan: Languages of Chitral. National Institute of Pakistan /* Location and demographics */ at Quaid-i-Azam University. p. 22.