Tagliamonte, Sali, author
West Sussex John Wiley & Sons, 2016
Buku Teks
Taglianonte, Sali A., author
Wiley-Blackwell, 2012
Buku Teks
Hudson, R. A., author
Cambridge , 1980
Buku Teks
Howells, William D., author
Doubleday, 1967
Buku Teks
Clarke, Arthur C.
Harper, 1957
Buku Teks