O`Keefe, Patrick, 1984-
Managing online forums: everything you need to know to create and run successful community discussion boards
American Management Association;, 2008
 eBooks
Polivka, Raymond P.
APL : the language and its usage
Prentice-Hall, 1975
 Buku Teks
Gilman, Leonard
APL an interactive approach
John Wiley & Sons, 1976
 Buku Teks
LePage, Wilbur R.
Applied APL programming
Prentice-Hall, 1978
 Buku Teks
Ijiri, Yuji
Accounting structured in APL
Toppan, 1987
 Buku Teks