Dana, Forest C.
Engineering problems manual
New York: McGraw-Hill, 1958
 Buku Teks
Ryan, Daniel
Computer graphics: problems manual
Brooks / Cole Pub, 1983
 Buku Teks
Soderquist, Larry D.
Corporations : cases, materials, problems
Michie, 1991
 Buku Teks
Waddell, Joseph J.
Construction materials ready-reference manual
McGraw-Hill, 1985
 Buku Referensi
Steiner, Henry J.
Transnational legal problems: materials and text
The Foundation Press, 1968
 Buku Teks