Gaya APA
Williamson, G.
(2017).
Katekismus Singkat Westminster 1; The Shorter Catechism 1
.
Surabaya:
Momentum.
Gaya MLA
Williamson, G.I.
"Katekismus Singkat Westminster 1; The Shorter Catechism 1".
Surabaya:
Momentum,
2017.
.