@book { ZuDavidHumeUntersuchungberdiePrinzipienderMoral,
    title = "Zu: David Hume - Untersuchung über die Prinzipien der Moral",
    author = "Peter {Schaefer}",
    year = "2011",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640873487",
    url = "https://www.hausarbeiten.de/document/169165"
}