Hubbard, L. Ron, 1911-1986, author
Hermitage House, 1950
Buku Referensi
Hubbard, L. Ron, 1911-1986, author
Hermitage House, 1950
Buku Teks
Worden, J. William, author
Routledge, 1991
Buku Teks
edited by James E. Birren, R. Bruce Sloane
Prentice-Hall, 1980
Buku Teks
edited by Wendy Bryant, Jon Fieldhouse, Katrina Bannigan
Churchill Livingstone/Elsevier, 2015
Buku Teks