Gaaf, W. v. d. (1904). The transition from impersonal to personal in Middle-English. J.H. Witzel.
Lua i Stíl Chicago (17ú heag.)Gaaf, Willem van der. The Transition from Impersonal to Personal in Middle-English. Hilversum: J.H. Witzel, 1904.
Lua MLA (8ú heag.)Gaaf, Willem van der. The Transition from Impersonal to Personal in Middle-English. J.H. Witzel, 1904.
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