(1989). Turbo prolog: Step by step, with Turbo Prolog 2.0 / Ralph Cafolla, Daniel Albert Kauffman ; instruction design by Don Gorman.
Chicago-čujuhus (17. p.)Turbo Prolog: Step by Step, with Turbo Prolog 2.0 / Ralph Cafolla, Daniel Albert Kauffman ; Instruction Design by Don Gorman. 1989.
MLA-čujuhus (9. p.)Turbo Prolog: Step by Step, with Turbo Prolog 2.0 / Ralph Cafolla, Daniel Albert Kauffman ; Instruction Design by Don Gorman. 1989.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.