COOPER ALAN. (1995). THE ESSENTIALS OF USER INTERFACE DESIGN. COMDEX COM. PUB.
Chicago-viite (17. p.)COOPER ALAN. THE ESSENTIALS OF USER INTERFACE DESIGN. COMDEX COM. PUB, 1995.
MLA-viite (9. p.)COOPER ALAN. THE ESSENTIALS OF USER INTERFACE DESIGN. COMDEX COM. PUB, 1995.
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