Leadbetter, P. (1991). Prolog: From formal specification to prototype. Blackwell scientific publications.
Dyfyniad Arddull ChicagoLeadbetter, Peter. Prolog: From Formal Specification to Prototype. London: Blackwell scientific publications, 1991.
Dyfyniad MLALeadbetter, Peter. Prolog: From Formal Specification to Prototype. Blackwell scientific publications, 1991.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.