@book { PilgrimsinthePort,
    title = "Pilgrims in the Port",
    subtitle = "The Identity of Migrant Christian Communities in Rotterdam",
    author = "Robert {Calvert}",
    year = "2020",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b16225",
    url = "https://www.peterlang.com/document/1110895"
}