Soyinka, Wale, author
Fonta Paperback, 1965
Buku Teks
Crezee, Ineke H.M, author
John Benjamins Publishing, 2013
Buku Teks
Brown, P.J., author
John Wiley & Sons, 1979
Buku Teks
Brown, P.J., author
John Wiley & Sons, [Date of publication not identified]
Buku Teks