Gaya APA
Williamson, G, I. (2012).
Katekismus Singkat Westminster 1 (The Shorter Catechism 1) (E : 1).
SURABAYA:
Penerbit Momentum.
Gaya MLA
Williamson, G., I..
"Katekismus Singkat Westminster 1 (The Shorter Catechism 1)".
E : 1
SURABAYA:
Penerbit Momentum,
2012.
Text.