lekachman, r., & novack, d. E. (1964). Development and society the dynamics of economic change. st martin's press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)lekachman, robert, و david E. novack. Development and Society the Dynamics of Economic Change. new york: st martin's press, 1964.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)lekachman, robert, و david E. novack. Development and Society the Dynamics of Economic Change. st martin's press, 1964.