Hubbard, L. Ron, 1911-1986, author
Bridge Publications, Inc., 2012
Buku Referensi
Greener, Leslie
The Viking Press , 1962
Buku Teks
edited by Lingfeng Wang
Springer, 2012
eBooks
Gorki, Maxim, author
T. Werner Laurie, [Date of publication not identified]
Buku Teks
Imanuel Reinaldo, author
2016
UI - Skripsi (Membership)