APA-referens (7:e uppl.)

Crookes, D. (1988). Introduction to programming in Prolog. Prentice Hall.

Chicago-referens (17:e uppl.)

Crookes, Danny. Introduction to Programming in Prolog. New York: Prentice Hall, 1988.

MLA-referens (9:e uppl.)

Crookes, Danny. Introduction to Programming in Prolog. Prentice Hall, 1988.