Original sentence: Crystal is the author, co-author, or editor of over 100 books on a wide variety of subjects, specialising among other things in editing reference works, including (as author) the Cambridge Encyclopedia of Language (1987) and the Cambridge Encyclopedia of the English Language (1995), and (as editor) the Cambridge Biographical Dictionary, the Cambridge Factfinder, the Cambridge Encyclopedia, and the New Penguin Encyclopedia (2003)
Edited sentence: Crystal is the author, co-author, or editor of over 100 books on a wide variety of subjects, specialising among other things in editing reference works, including (as author) the Cambridge Encyclopedia of Language (1987) and the Cambridge Encyclopedia of the English Language (1995, 2003), and (as editor) the Cambridge Biographical Dictionary, the Cambridge Factfinder, the Cambridge Encyclopedia, and the New Penguin Encyclopedia (2003)