Clark, R. L., & Anker, R. (1990). Labour force participation rates of older persons: An international comparison. International Labour Office.
Cita Chicago (17th ed.)Clark, Robert L., i Richard Anker. Labour Force Participation Rates of Older Persons: An International Comparison. Geneva: International Labour Office, 1990.
Cita MLA (9th ed.)Clark, Robert L., i Richard Anker. Labour Force Participation Rates of Older Persons: An International Comparison. International Labour Office, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.