@book { Ichcoachemichselbst,
    title = "Ich coache mich selbst!",
    author = "Gunnar {Cramer} and Dag {Furuholmen}",
    year = "2010",
    publisher = "humboldt",
    address = "Hannover, Deutschland",
    url = "https://schluetersche.openpublishing.com/document/403320"
}