@book { SamuelBeckettsAbstractDrama,
    title = "Samuel Beckett’s Abstract Drama",
    subtitle = "Works for Stage and Screen- 1962-1985",
    author = "Erik {Tonning}",
    year = "2007",
    publisher = "Peter Lang Verlag",
    address = "Oxford, United Kingdom",
    url = "https://www.peterlang.com/document/1102430"
}