Billings, Diane M., author
W.B. Saunders , 1998
Buku Teks
Billings, Diane M., author
Elsevier/Saunders, 2012
Buku Teks
Bellings, Diane M., author
Saunders Elsevier, 2009
Buku Teks
Moche, Dinah L., author
John Wiley & Sons, 1981
Buku Teks
Moulton, William G., author
Modern Language Association of America, 1966
Buku Teks