@book { CatholicityChallengingEthnicity,
    title = "Catholicity Challenging Ethnicity",
    subtitle = "An Ecclesiological Study of Congregations and Churches in Post-apartheid South Africa",
    author = "Erik {Berggren}",
    year = "2016",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-05387-6",
    url = "https://www.peterlang.com/document/1049130"
}