APA Style

Owen, J., Potalangi, Y. (2005). Christians Are For Ever = Jaminan Keselamatan Kristen (1). Surabaya: Momentum.

MLA Style

Owen, John., Potalangi, Yvonne. "Christians Are For Ever = Jaminan Keselamatan Kristen". 1 Surabaya: Momentum, 2005. Text.