,Histories of the Latin language, from ancient times to the present: Janson, Tore, A Natural History of Latin, transl. Sorensen, Merethe Damsgard and Vincent, Nigel (Oxford, 2004); Ostler, Nicholas, Ad Infinitum: A Biography of Latin (New York, 2007).
,On Indo-European: Watkins, Calvert, ed., The American Heritage Dictionary of Indo-European Roots, 2nd ed., (Boston and New York, 2000), also found as an appendix to that dictionary.
,On Vulgar Latin: Herman, József, Vulgar Latin, transl. Wright, Roger (University Park, 2000).
,On the Romance languages: Posner, Rebecca, The Romance Languages: A Linguistic Introduction (Garden City, 1966); Boyd-Bowman, Peter, From Latin to Romance in Sound Charts (Washington, 1954); Pei, Mario, The Story of Latin and the Romance Languages (New York, 1976).
,English etymological dictionaries: Barnhart, Robert K., ed., The Barnhart Dictionary of Etymology (New York, 1988); Klein, Ernest, A Comprehensive Etymological Dictionary of the English Language (Amsterdam, 1971); Onions, C. T., ed., The Oxford Dictionary of English Etymology (New York, 1966).
,On the histories of English words: [Mish, Frederick C., ed.] Webster's Dictionary of Word Origins (Springfield, MA, 1989); Greenough, James Bradstreet and Kittredge, George Lyman, Words and Their Ways in English Speech (Boston, 1900; reprinted); Heller, Louis, Humez, Alexander, and Dror, Malcah, The Private Lives of English Words (London, 1984); Hughes, Geoffrey, Words in Time: A Social History of the English Vocabulary (Oxford, 1988), and A History of English Words (Oxford, 2000); Owen Barfield, History in English Words, rev. ed. (Grand Rapids, 1967).
