@book {9783593421643, title = "Hart, aber unfair", author = "Weidner, Jens", isbn = "9783593421643", year = "2013", edition = "1", keywords = "Kommunikation, verhandeln, Aggressionen, Arbeitswelt, Kollegen, Peperonie, aggro, Schlagabtausch, Ellenbogen, Streit, Team, Durchsetzen, Argumentation", url = "http://www.content-select.com/index.php?id=bib_view&ean=9783593421643", url = "https://content-select.com/de/portal/media/view/5305e024-8ce0-43be-8859-7d8f2efc1343", publisher = "Campus Frankfurt / New York", language = "ger", }