APA Style

Williamson, G, I., Tjulianto, I. (2017). Pengakuan Iman Westminster = Westminster Confession of Faith (1). Surabaya: Momentum.

MLA Style

Williamson, G., I.., Tjulianto, Irwan. "Pengakuan Iman Westminster = Westminster Confession of Faith". 1 Surabaya: Momentum, 2017. Text.