Falconer Madan, et al., A summary catalogue of western manuscripts in the Bodleian Library at Oxford which have not hitherto been catalogued in the Quarto series (7 vols. in 8 [vol. II in 2 parts], Oxford, 1895-1953; reprinted, with corrections in vols. I and VII, Munich, 1980), vol. II, no. 281

Catalogi codicum manuscriptorum Bibliothecae Bodleianae pars prima recensionem codicum Graecorum continens (Oxford, 1853, reprinted with corrections by H. O. Coxe, Oxford, 1969), Cromwell no. 21