purdy, d. (1988). social power and the labour market: A radical approach to labour economics. ,Macmillan education.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)purdy, david. Social Power and the Labour Market: A Radical Approach to Labour Economics. London: ,Macmillan education, 1988.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)purdy, david. Social Power and the Labour Market: A Radical Approach to Labour Economics. ,Macmillan education, 1988.