Salvatore, Dominick, author
John Wiley & Sons, 2007
Buku Teks
Appleyard, Dennis R., author
McGraw-Hill, 2014
Buku Teks
Salvatore, Dominick, author
Macmillan, 1993
Buku Teks
Salvatore, Dominick, author
Prentice-Hall, 1998
Buku Teks
by George Zis ... [et al.]
Longman, 1988
Buku Teks