@book { WirkfaktoreninCoachingtoolsunterderLupe,
    title = "Wirkfaktoren in Coachingtools unter der Lupe",
    author = "Theresa {Wechsler}",
    year = "2012",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783842831704",
    url = "https://m.diplom.de/document/229227"
}