Παραπομπή σε μορφή APA (7η εκδ.)

Stellhorn, W. H. (1974). An experimental information retrieval system. Dept. of Computer Science, University of Illinois at Urbana-Champaign.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Stellhorn, William Howard. An Experimental Information Retrieval System. Urbana: Dept. of Computer Science, University of Illinois at Urbana-Champaign, 1974.

Παραπομπή σε μορφή MLA (8th εκδ.)

Stellhorn, William Howard. An Experimental Information Retrieval System. Dept. of Computer Science, University of Illinois at Urbana-Champaign, 1974.