Berkhof, H. (1989). Two hundred years of theology: Report of a personal journey. Grand Rapids.
Citazione stile Chigago Style (17a edizione)Berkhof, Hendrikus. Two Hundred Years of Theology: Report of a Personal Journey. Michigan: Grand Rapids, 1989.
Citatione MLA (9a ed.)Berkhof, Hendrikus. Two Hundred Years of Theology: Report of a Personal Journey. Grand Rapids, 1989.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.