Cita APA (7a ed.)

Douglas, P. H., Director, A., & Aydelotte, F. (1931). The problem of unemployment. MacMillan Company.

Cita Chicago Style (17a ed.)

Douglas, Paul Howard, Aaron Director, y Frank Aydelotte. The Problem of Unemployment. New York: MacMillan Company, 1931.

Cita MLA (9a ed.)

Douglas, Paul Howard, et al. The Problem of Unemployment. MacMillan Company, 1931.