@book { SchulentwicklungEineexplorativeStudiezumThemaSchulschwierigkeiten,
    title = "Schulentwicklung: Eine explorative Studie zum Thema Schulschwierigkeiten",
    author = "Ernst {Abrams}",
    year = "2015",
    publisher = "BACHELOR + MASTER PUBLISHING",
    address = "Hamburg, Deutschland",
    url = "https://m.bachelor-master-publishing.de/document/296693"
}