Langer, Maria
Quicken 2000 : the official guide
Osborne/McGraw-Hill, 1999
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Guide to official statistics
Central Statistical Office
Her Majesty`s Stationery Office, 1986
 Buku Referensi
Volitich, Dan; Oehler, Karsten
IBM Cognos TM1 : the official guide
McGraw-Hill, 2012
 Buku Teks SO
Ward, Brice
Beginner's guide to computer programming
Blue Ridge Summit TAB Books , 1971
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McCracken, Daniel D.
A simplified guide to FORTRAN programming
John Wiley & Sons, 1974
 Buku Referensi