@book { RobertKMertonsTheoriederselffulfillingprophecy,
    title = "Robert K. Mertons Theorie der self-fulfilling prophecy",
    author = "Markus {Schnepper}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1097756"
}