Allen, Edward, author
John Wiley & Sons, 2012
Buku Teks
Allen, Edward, author
Wiley, 1993
Buku Teks
Allen, Edward, author
John Wiley & Sons, 2007
Buku Teks
Guthrie, Pat, author
McGraw-Hill, 1995
Buku Referensi
Guthrie, Pat, author
McGraw-Hill, 2010
Buku Referensi