@book { DieTrilogosPsyQMethode,
    title = "Die Trilogos-PsyQ ® Methode",
    author = "Linda Vera {Roethlisberger}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1101626"
}