Hubbard, L. Ron, 1911-1986, author
Bridge Publications, Inc., 2012
Buku Referensi
edited by Desmond G. King-Hele
Cambridge University Press, 2007
Buku Teks
Reinhold, Karl Leonhard, author
Cambridge, 2006
Buku Teks
Adams, Gelnda, author
Marege: Jurnal Pusat Kajian Australia, 1998
Artikel Jurnal
Seglin, Jeffrey L., author
[American Management Association, American Management Association], 2002
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