Thatcher, G.W., author
Frederick Ungar, [Date of publication not identified]
Buku Teks
Wehr, Hans, 1909-1981, author
Spoken Language Services, 1976
Buku Referensi
Badawi, El-Said, author
Routledge, 2004
Buku Referensi
Halliday, M.A.K., author
Oxford University Press, 1989
Buku Teks
Foreign Languages Press, 1958
Buku Teks