Dik, J. J. (1983). Tests for preference. Mathematisch Centrum.
Lua i Stíl Chicago (17ú heag.)Dik, J. J. Tests for Preference. Amsterdam: Mathematisch Centrum, 1983.
Lua MLA (8ú heag.)Dik, J. J. Tests for Preference. Mathematisch Centrum, 1983.
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