Boulter, N. (1999). The art of HRD: People and competencies. Crest Publishing House.
Chicago Style aipamenaBoulter, Nick. The Art of HRD: People and Competencies. New Delhi: Crest Publishing House, 1999.
MLA aipamenaBoulter, Nick. The Art of HRD: People and Competencies. Crest Publishing House, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.