@book { KonzepteausderSprachlehrforschungImpulsefrdiePraxis,
    title = "Konzepte aus der Sprachlehrforschung – Impulse für die Praxis",
    author = "Jessica {Böcker} and Anette {Stauch}",
    year = "2015",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-04310-5",
    url = "https://www.peterlang.com/document/1048060"
}