Gaya APA

Pennsylvania, W, T, B, A, T, S, O. (2010). The origin of life : five questions worth asking . Jakarta: Saksi-saksi Yehuwa Indonesia.

Gaya MLA

Pennsylvania, Watch, Tower, Bible, And, Tract, Society, Of. "The origin of life : five questions worth asking". Jakarta: Saksi-saksi Yehuwa Indonesia, 2010. UMUM.