ScienceDirect (Online service). (1971). Discrete mathematics. North-Holland Pub. Co..
Čikaški stil citiranja (17. izdanje)ScienceDirect (Online service). Discrete Mathematics. Amsterdam: North-Holland Pub. Co., 1971.
MLA način citiranja (8. izdanje)ScienceDirect (Online service). Discrete Mathematics. North-Holland Pub. Co., 1971.
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