@book { ErklrungsanstzezumSpracherwerb,
    title = "Erklärungsansätze zum Spracherwerb",
    author = "Mandy {Rüger}",
    year = "2011",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640955206",
    url = "https://www.hausarbeiten.de/document/174854"
}