Forsmark, J. (1996). QBasic for business problem solving. Irwin.
Lua i Stíl Chicago (17ú heag.)Forsmark, John. QBasic for Business Problem Solving. Chicago: Irwin, 1996.
Lua MLA (9ú heag.)Forsmark, John. QBasic for Business Problem Solving. Irwin, 1996.
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