@book { DasDatenfeedbackalsInstrumentderProzessevaluationinnovativerSchulentwicklung,
    title = "Das Datenfeedback als Instrument der Prozessevaluation innovativer Schulentwicklung",
    author = "Ulrich {Stössel}",
    year = "1980",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1072148"
}