@book { DieRolledesL2InputsinbilingualenKindergrten,
    title = "Die Rolle des L2-Inputs in bilingualen Kindergärten",
    author = "Martina {Weitz}",
    year = "2015",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-05132-2",
    url = "https://www.peterlang.com/document/1050373"
}