Clocksin, W. F. (1993). Programming In Prolog (Ed.3 rev and enl.). Nurosa Publishing House.
Dyfyniad Arddull ChicagoClocksin, W F. Programming In Prolog. Ed.3 rev and enl. Nurosa Publishing House, 1993.
Dyfyniad MLAClocksin, W F. Programming In Prolog. Ed.3 rev and enl. Nurosa Publishing House, 1993.
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