Hubbard, L. Ron, 1911-1986, author
Hermitage House, 1950
Buku Teks
Hubbard, L. Ron, 1911-1986, author
Hermitage House, 1950
Buku Referensi
Crepeau, Elizabeth Blesedell, author
Wolters Kluwer, 2009
Buku Teks
Sames, Karen M., author
Pearson Education, 2015
Buku Teks
O`Brien, Jane Clifford
Elsevier, 2012
Buku Teks