Gaya APA

Bierma, L, D. et al (2005). Introduction to the Heidelberg Catechism, An : Sources, History, and Theology . Grand Rapids, Michigan, USA: Baker Academic.

Gaya MLA

Bierma, Lyle, D.. et al. "Introduction to the Heidelberg Catechism, An : Sources, History, and Theology". Grand Rapids, Michigan, USA: Baker Academic, 2005. Academic.