Παραπομπή σε μορφή APA (7η εκδ.)

Autor, D. H. (2000). Why do temporary help firms provide free general skills training? National Bureau of Economic Research.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Autor, David H. Why Do Temporary Help Firms Provide Free General Skills Training? Cambridge: National Bureau of Economic Research, 2000.

Παραπομπή σε μορφή MLA (9th εκδ.)

Autor, David H. Why Do Temporary Help Firms Provide Free General Skills Training? National Bureau of Economic Research, 2000.