Lydall, H. F. (1968). The structure of earnings. Oxford.
Cita Chicago (17th ed.)Lydall, Harold French. The Structure of Earnings. New York: Oxford, 1968.
Cita MLA (9th ed.)Lydall, Harold French. The Structure of Earnings. Oxford, 1968.
Atenció: Aquestes cites poden no estar 100% correctes.