@book { IntrinsischevsextrinsischeMotivation, title = "Intrinsische vs. extrinsische Motivation", author = "Viktoria {Hermes}", year = "2011", publisher = "GRIN Verlag", address = "München, Germany", doi = "10.3239/9783656015758", url = "https://www.hausarbeiten.de/document/179199" }