The following timeline of twentieth-century theatre offers a year-by-year account of the performance and publication of notable works of drama and significant events in the history of theatre during the 20th century. Musical theatre works are excluded from the list below.
^Catalog of the Theatre and Drama Collections. G. K. Hall. 1967. p. 980.
^Vrânceanu, Mircea (1947). Însemnările unui răsvrătit. Bucharest: Editura Socialistă. p. 62.
^Alan Goble (1999). The Complete Index to Literary Sources in Film. Walter de Gruyter. p. 111.
^Claude Schumacher; Glynne W. Wickham; John Northam, eds. (1996). Naturalism and Symbolism in European Theatre 1850-1918. Cambridge University Press. p. 218.
^Brugha, Máire MacSwiney (2006). History's Daughter: A Memoir from the Only Child of Terence MacSwiney. Dublin: The O'Brien Press. ISBN978-0-86278-986-2.
^John London, ed. (2000). Theatre Under the Nazis. Manchester University Press. p. 103. ISBN9780719059919.
^Henry Bial (2015). Playing God: The Bible on the Broadway Stage. University of Michigan Press. p. 197. ISBN9780472052929.
^Noël Coward (1999). Collected Plays. Methuen. p. vii.
^J. P. Wearing (2014). The London Stage 1930-1939: A Calendar of Productions, Performers, and Personnel. Rowman & Littlefield. p. 16.
^Gerald Martin Bordman (1996). American Theatre: a Chronicle of Comedy and Drama 1930-1969. Oxford. p. 9. ISBN0-19-509078-0
^Josh Stenberg (2019). Minority Stages: Sino-Indonesian Performance and Public Display. University of Hawaii Press. p. 136. ISBN9780824876715.
^Martínez Nadal, Rafael (1974), Lorca's The Public: A Study of his Unfinished Play (El público) and of Love and Death in the Work of Federico García Lorca, London: Calder & Boyars, pp. 70–82, ISBN0-7145-2752-1