Samarin, William J.
Holt, Rinehart and Winston, 1966
Buku Teks
Paul Newman, Martha Ratliff, editor
Cambridge Uniiversity Press , 2001
Buku Teks
Cambridge University Press, 2001
eBooks
Moody, Richard, author
Chancelor, 1994
Buku Teks
Nelson, Stephen L., author
Elex Media Komputindo , 1996
Buku Teks