@book { PositivePsychologyintheMilitary,
    title = "Positive Psychology in the Military",
    author = "Hubert {Annen}",
    year = "2023",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b20427",
    url = "https://www.peterlang.com/document/1304410"
}