@book { FamilieninderSystemtherapieProblemdesreentry,
    title = "Familien in der Systemtherapie -  Problem des re-entry ",
    author = "Randy {Adam}",
    year = "2006",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640083459",
    url = "https://www.hausarbeiten.de/document/110169"
}