Cita APA (7th ed.)

Bell, S. (1940). Productivity, wages, and national income. Brookings Institution.

Cita Chicago (17th ed.)

Bell, Spurgeon. Productivity, Wages, and National Income. Washington, D.C: Brookings Institution, 1940.

Cita MLA (9th ed.)

Bell, Spurgeon. Productivity, Wages, and National Income. Brookings Institution, 1940.