Παραπομπή σε μορφή APA (7η εκδ.)

Fitz-enz,Jac. (2009). The ROI of human capital: Measuring the economic value of employee performance (2nd ed.). AMACOM.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Fitz-enz,Jac. The ROI of Human Capital: Measuring the Economic Value of Employee Performance. 2nd ed. New York: AMACOM, 2009.

Παραπομπή σε μορφή MLA (9th εκδ.)

Fitz-enz,Jac. The ROI of Human Capital: Measuring the Economic Value of Employee Performance. 2nd ed. AMACOM, 2009.