Mann, Thomas
Oxford University Press, 2005
Buku Teks SO
Mann, Thomas
Oxford University Press, 2005
Buku Teks SO
Lawal, Ibironke O.
Chandos Publishing, 2009
Buku Teks
Kennedy, James H.
Pierian Press, 1984
Buku Referensi
Weiner, E.S.C., compiler
Clarendon Press, 1993
Buku Referensi