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Citra, 2006
Buku Teks
edited by Alton Bryant
Minnesota , Billy Graham Evangelistic Association
Buku Referensi
Satya Swarup Misra
Munshiram Manohorlal , 1992
Buku Teks
Sari Dwi Septiyani, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2013
UI - Skripsi (Membership)
Biondi Firmansyah, author
Universitas Indonesia, 2012
UI - Skripsi (Open)