Citazione Stile APA (7a Edizione)

Garey, M. R., & Johnson, D. S. (1979). Computers and intractability: A guide to the theory of NP-Completeness (27a. ed.). W. H. Freeman and Company.

Citazione stile Chigago Style (17a edizione)

Garey, Michael R., e David S. Johnson. Computers and Intractability: A Guide to the Theory of NP-Completeness. 27a. ed. Nueva York: W. H. Freeman and Company, 1979.

Citatione MLA (9a ed.)

Garey, Michael R., e David S. Johnson. Computers and Intractability: A Guide to the Theory of NP-Completeness. 27a. ed. W. H. Freeman and Company, 1979.