Balakrishnan, V. K. (1991). Introductory discrete mathematics. Prentice Hall International.
Lua i Stíl Chicago (17ú heag.)Balakrishnan, V. K. Introductory Discrete Mathematics. Englewood Cliffs, N.J: Prentice Hall International, 1991.
Lua MLA (9ú heag.)Balakrishnan, V. K. Introductory Discrete Mathematics. Prentice Hall International, 1991.
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