@book { ePortfoliosimFremdsprachenunterricht,
    title = "ePortfolios im Fremdsprachenunterricht",
    author = "Lena {Bellingrodt}",
    year = "2018",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b15272",
    url = "https://www.peterlang.com/document/1068697"
}