HEARN DONALD. (1983). COMPUTER GRAPHICS FOR THE IBM PERSONAL COMPUTER. PRENTICE -HALL INTERNATIONAL, INC.
Lua i Stíl Chicago (17ú heag.)HEARN DONALD. COMPUTER GRAPHICS FOR THE IBM PERSONAL COMPUTER. NEW YORK: PRENTICE -HALL INTERNATIONAL, INC, 1983.
Lua MLA (9ú heag.)HEARN DONALD. COMPUTER GRAPHICS FOR THE IBM PERSONAL COMPUTER. PRENTICE -HALL INTERNATIONAL, INC, 1983.
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