Leestma, S., & Nyhoff, L. R. (1990). Pascal: Programming and problem solving (3rd ed.). Macmillan ; Collier Macmillan.
Lua i Stíl Chicago (17ú heag.)Leestma, Sanford, agus Larry R. Nyhoff. Pascal: Programming and Problem Solving. 3rd ed. New York : London: Macmillan ; Collier Macmillan, 1990.
Lua MLA (9ú heag.)Leestma, Sanford, agus Larry R. Nyhoff. Pascal: Programming and Problem Solving. 3rd ed. Macmillan ; Collier Macmillan, 1990.
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