APA Style

Williamson, G. (2009). Katekismus singkat westminster 1 (the shorter catechism1) (Jil.1). Surabaya: Momentum.

MLA Style

Williamson, G.I.. "Katekismus singkat westminster 1 (the shorter catechism1)". Jil.1 Surabaya: Momentum, 2009. Buku SMP Athalia.