Cleary, Jon, author
Collins Publishers Australia, 1947
Buku Teks
Journal of Dentistry Indonesia, 2003
Artikel Jurnal
Muthahhari, Murtadha, author
Alhuda, 2006
Buku Teks
King, MArtin Luthre
Harper & Row pub, 1964
Buku Teks
Walton, Donald, author
McGraw-Hill , 1989
Buku Teks