Garey, M. R., & Johnson, D. S. (1979). Computers and intractability: A guide to the theory of NP-completeness. W. H. Freeman.
Lua i Stíl Chicago (17ú heag.)Garey, Michael R., agus David S. Johnson. Computers and Intractability: A Guide to the Theory of NP-completeness. New York ; Houndmills ; San Francisco: W. H. Freeman, 1979.
Lua MLA (8ú heag.)Garey, Michael R., agus David S. Johnson. Computers and Intractability: A Guide to the Theory of NP-completeness. W. H. Freeman, 1979.
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