Peter Salim, author
Modern English Press, 1994
Buku Referensi
Daniels, Rick, author
Delmar Cengage Learning, 2012
Buku Referensi
Peter Salim, author
Modern English Press, [date of publication not identified]
Buku Referensi
Arens, William F., author
Irwin /McGraw-Hill, 1999
Buku Teks
Jones, Gareth R., author
McGraw-Hill, Irwin, 2006
Buku Teks