Singh,U.B. (2008). Time Management: A Study of HRD managers.
Chicago Style aipamenaSingh,U.B. Time Management: A Study of HRD Managers. Delhi, 2008.
MLA aipamenaSingh,U.B. Time Management: A Study of HRD Managers. 2008.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.