Holloway, William Vernon, author
McGraw-Hill , 1951
Buku Teks
Foreign Language Press, 1959
Buku Teks
Bingham, Richard D., author
McGraw-Hill, 1991
Buku Teks
Adrian, Charles R., author
McGraw-Hill , 1978
Buku Teks
Vincent, Andrew
Basil Blackwell, 1987
Buku Teks