Keenleyside, Anne
W. Ross MacDonald School Resource Services Library, 2015
Buku Teks
Alland, Alexander
John Wiley & Sons,Inc., 1980
Buku Teks
Firth, Raymond
The New American Library, 1958
Buku Teks
Fuentes, Agustin
McGraw-Hill, 2012
Buku Teks
The Ronald Press Company, 1965
Buku Teks