↑Donno, Elizabeth (1983). The Renaissance : Excluding Drama (yn Saesneg). London: Macmillan Education UK Imprint Palgrave. t. 19. ISBN9781349170586.
↑Ravelhofer, B (2017). James Shirley and early modern theatre : new critical perspectives (yn Saesneg). London: Routledge, Taylor & Francis Group. t. 57. ISBN9781317111528.
↑Sprunger, Keith (2016). The Learned Doctor William Ames Dutch Backgrounds of English and American Puritanism (yn Saesneg). Eugene: Wipf and Stock Publishers. t. 247. ISBN9781725237599.