@book { SongbirdsontheLiteraryStage,
    title = "Songbirds on the Literary Stage",
    author = "Julia {Effertz}",
    year = "2015",
    publisher = "Peter Lang Verlag",
    address = "Oxford, United Kingdom",
    doi = "10.3726/978-3-0353-0749-8",
    url = "https://www.peterlang.com/document/1052444"
}