APA-referens (7:e uppl.)

(1989). Logic programming: Proceedings of the North American conference, 1989 / edited by Ewing L. Lusk and Ross A. Overbeek.

Chicago-referens (17:e uppl.)

Logic Programming: Proceedings of the North American Conference, 1989 / Edited by Ewing L. Lusk and Ross A. Overbeek. 1989.

MLA-referens (9:e uppl.)

Logic Programming: Proceedings of the North American Conference, 1989 / Edited by Ewing L. Lusk and Ross A. Overbeek. 1989.