Smith, Daniel, author
Michael O'Mara Books Limited, 2015
Buku Teks
Stinnett, Bill, author
McGraw-Hill, 2005
Buku Teks
Levitt, Steven D., author
NY William Morrow, 2014
Buku Teks
McGraw-Hill, [date of publication not identified]
Buku Teks
Heshey, John, 1914-1993, author
McGraw-Hill, 2012
Buku Teks