Links:[1] https://c3i.sabda.org/jenis_bahan_c3i/online_book [2] https://c3i.sabda.org/fokus_c3i/fokus_c3i_juni_2006_kehidupan_doa_dalam_keluarga [3] http://c3i.sabda.org/buku_pegangan_pelayanan_kristen