Burke, T. Patrick, author
Blackwell, 2005
Buku Teks
Saint-Laurent, George E., author
Mayfield, 2000
Buku Teks
Ferraby, John, author
Baha'i, 2011
Buku Teks
Smith, Huston, author
Yayasan Obor Indonesia, 2008
Buku Teks
James, William, author
Mentor Books, 1958
Buku Teks