Seckler-Hudson, Catheryn
United State Information Service, 1959
Buku Teks
Leonard, Karen Isaksen
Sage, 2003
Buku Teks
Dib, Georges Moussa
Djambatan, 1956
Buku Teks
Fifield, Russell H.
Praeger , 1963
Buku Teks
Holloway, William Vernon
McGraw-Hill , 1951
Buku Teks