Cita APA (7a ed.)

Campbell, J. A. (1985). Implementations of Prolog. Ellis Horwood [etc.].

Cita Chicago Style (17a ed.)

Campbell, J. A. Implementations of Prolog. Chichester [etc.]: Ellis Horwood [etc.], 1985.

Cita MLA (9a ed.)

Campbell, J. A. Implementations of Prolog. Ellis Horwood [etc.], 1985.