Backer, E. (1995). Computer Assisted Reasoning In Cluster Analysis Eric Backer. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Backer, Eric. Computer Assisted Reasoning In Cluster Analysis Eric Backer. Prentice-Hall, 1995.
Lua MLA (8ú heag.)Backer, Eric. Computer Assisted Reasoning In Cluster Analysis Eric Backer. Prentice-Hall, 1995.
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