JOHNSONBAUGH RICHARD. (1989). DISCRETE MATHEMATICS. MACMILLAN.
Lua i Stíl Chicago (17ú heag.)JOHNSONBAUGH RICHARD. DISCRETE MATHEMATICS. LONDON: MACMILLAN, 1989.
Lua MLA (9ú heag.)JOHNSONBAUGH RICHARD. DISCRETE MATHEMATICS. MACMILLAN, 1989.
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