(2008). HR [human resources] Excellence 2007. Salemba Empat.
Chicago Style aipamenaHR [human Resources] Excellence 2007. Salemba Empat, 2008.
MLA aipamenaHR [human Resources] Excellence 2007. Salemba Empat, 2008.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.