@book { quivalenzundEffekttestsinderpsychologischenForschung,
    title = "Äquivalenz- und Effekttests in der psychologischen Forschung",
    author = "Hella {Klemmert}",
    year = "2004",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1098151"
}