Sirageldin, I. (1979). Research in human capital and development. JAI Press.
Cita Chicago (17th ed.)Sirageldin, Ismail. Research in Human Capital and Development. Greenwich, Conn: JAI Press, 1979.
Cita MLA (9th ed.)Sirageldin, Ismail. Research in Human Capital and Development. JAI Press, 1979.
Atenció: Aquestes cites poden no estar 100% correctes.