@book { VietnamsEthnicandReligiousMinorities,
    title = "Vietnam's Ethnic and Religious Minorities:",
    subtitle = "A Historical Perspective",
    author = "Jörg Thomas {Engelbert}",
    year = "2016",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-05334-0",
    url = "https://www.peterlang.com/document/1049123"
}