Oxford Dictionary of National Biography
S. M. Farrell, Wentworth, Charles Watson-, second marquess of Rockingham (17301782), first published 2004; online edn, Jan 2008, 6558 words, with portrait illustration
http://dx.doi.org/10.1093/ref:odnb/28878
> View Charles Watson Wentworth complete biography [Oxford DNB subscription required; no subscription?]
