^Palmer، Alan؛ Veronica (1992). The Chronology of British History. London: Century Ltd. ص. 166–168. ISBN:0-7126-5616-2.
^Edwards, Phillip، المحرر (1985). Hamlet, Prince of Denmark. New Cambridge Shakespeare. Cambridge University Press. ص. 8. ISBN:0-521-29366-9. Any dating of Hamlet must be tentative.