Παραπομπή σε μορφή APA (7η εκδ.)

Tuthill, G. S. (1989). Knowledge engineering: Concepts and practices for knowledge-based systems. Tab books.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Tuthill, G. Steven. Knowledge Engineering: Concepts and Practices for Knowledge-based Systems. Blue Ridge Summit: Tab books, 1989.

Παραπομπή σε μορφή MLA (9th εκδ.)

Tuthill, G. Steven. Knowledge Engineering: Concepts and Practices for Knowledge-based Systems. Tab books, 1989.