Ward, John, author
Routledge , 1997
Buku Teks
St.Martin`s Press, 1971
Buku Teks
Lewis, William Arthur, 1915-, author
University of Ghana by the Ghana Pub, 1971
Buku Teks
Szulc, Tad, author
Atheneum, 1966
Buku Teks
Szulc, Tad, author
Atheneum, 1966
Buku Teks