Berkhof, H. (1989). Two hundred years of theology: Report of a personal journey. Grand Rapids.
Lua i Stíl Chicago (17ú heag.)Berkhof, Hendrikus. Two Hundred Years of Theology: Report of a Personal Journey. Michigan: Grand Rapids, 1989.
Lua MLA (9ú heag.)Berkhof, Hendrikus. Two Hundred Years of Theology: Report of a Personal Journey. Grand Rapids, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.