1. Abbott, Edwin A. (1870) A Shakespearian Grammar, 3rd ed., R. Clay, Sons & Taylor, London. [Reprinted by University Press of the Pacific, Honolulu, 2004.]
2. Aijmer, Karin (1985) “The Semantic Development of Will,” Historical Semantics, Historical Word Formation, ed. by Jacek Fisiak, 11–21, Mouton de Gruyter, Berlin.
3. Baldwin, Charles S. (1894) The Inflections and Syntax of the Morte d’Arthur of Sir Thomas Malory: A Study in Fifteenth-Century English, Ginn & Company, Boston.
4. Biber, Douglas and Edward Finegan (1992) “The Linguistic Evolution of Five Written and Speech-Based English Genres from the 17th to the 20th Centuries,” History of Englishes: New Methods and Interpretations in Historical Linguistics, ed. by Matti Rissanen, Ossi Ihalainen, Terttu Nevalainen and Irma Taavitsainen, 688–704, Mouton de Gruyter, Berlin.
5. Biber, Douglas, Stig Johansson, Geoffrey Leech, Susan Conrad and Edward Finegan (1999) Longman Grammar of Spoken and Written English, Longman, Harlow.