Hatch, Mary Jo
Oxford University Press, 1997
Buku Teks
Zwerman, William L
Greenwood Publishing Corporation, 1970
Buku Teks
Hatch, Mary Jo
Oxford University Press, 1997
Buku Teks
French, Wendell L.
Prentice-Hall International, 1990
Buku Teks
Caplo, Theodore
Harcourt, Brace & World, 1964
Buku Teks