Langacker, Ronald W., author
Harcourt, Brace & World, 1968
Buku Teks
John E. Joseph, author
Edinburgh University Press, 2009
eBooks
Moulton, William G., author
Modern Language Association of America, 1966
Buku Teks
edited by Harriet Luria, Deborah M. Seymour, Trudy Smoke
LEA, 2006
Buku Teks
Lyons, John, author
Cambridge University Press, 1991
Buku Teks