Gaya APA

Fitz-Enz, J. (2009). The ROI of human capital : measuring the economic value of employee performance (2nd Ed.). New York: Amacom.

Gaya MLA

Fitz-Enz, Jac. "The ROI of human capital : measuring the economic value of employee performance". 2nd Ed. New York: Amacom, 2009. Buku/Printed Material.