@book { ReligiousLibertyintheEducationalSystemoftheUnitedStates,
    title = "Religious Liberty in the Educational System of the United States",
    author = "Iwona {Zamkowska}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b16061",
    url = "https://www.peterlang.com/document/1057680"
}