Rangkuti, Hamsad, 1943-, author
DIVA press, 2017
Buku Teks
Kapur, Daryai Lal, author
Yayasan Radha Soami Satsang Beas Indonesia , 1999
Buku Teks
M. Karjadi, author
Politeia, 1982
Buku Teks
Morrison, John, author
Seven Seas, 1968
Buku Teks
Robert Cornraads and five outhers, author
Reader's Digest, 2015
Buku Referensi