SMITH DAVID G. (1989). PROLOG THROUGH EXAMPLES: APROACTICAL PROGRAMMING GUIDE. GALGOTIA PUBLICATION.
Lua i Stíl Chicago (17ú heag.)SMITH DAVID G. PROLOG THROUGH EXAMPLES: APROACTICAL PROGRAMMING GUIDE. NEW DELHI: GALGOTIA PUBLICATION, 1989.
Lua MLA (9ú heag.)SMITH DAVID G. PROLOG THROUGH EXAMPLES: APROACTICAL PROGRAMMING GUIDE. GALGOTIA PUBLICATION, 1989.
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