@book { KooperativesLernenimSchulunterricht, title = "Kooperatives Lernen im Schulunterricht", author = "Hasret {Deliorman}", year = "2009", publisher = "GRIN Verlag", address = "München, Germany", doi = "10.3239/9783640428595", url = "https://www.hausarbeiten.de/document/135910" }