Vachek, Josef
Indiana University Press, 1966
Buku Teks
Fabb, Nigel
Camridge University Press , 2002
Buku Teks
Lyons, John
Cambridge University Press, 1991
Buku Teks
Moulton, William G.
Modern Language Association of America, 1966
Buku Teks
Yule, George
Cambridge University Press, 2018
Buku Teks