Cita APA (7th ed.)

Covington, M. A., Nute, D., & Vellino, A. (1997). Prolog programming in depth. Prentice Hall.

Cita Chicago (17th ed.)

Covington, Michel A., Donald Nute, i André Vellino. Prolog Programming in Depth. Hoboken: Prentice Hall, 1997.

Cita MLA (9th ed.)

Covington, Michel A., et al. Prolog Programming in Depth. Prentice Hall, 1997.