USA : Macmillan, 1996,
Buku Referensi
prepared under the editorial supervision of In Plain English, Inc.
Macmillan, 1996
Buku Referensi
Houghton Mifflin , 1993
Buku Referensi
Boston: Houghton: 1993,
Buku Referensi
Myerson, Jeremy, author
Laurence King, 2006
Buku Referensi