Kaplan, B. H. (1978). Social change in the capitalist world economy: [papers presented at the first annual spring conference on the political economy of the world system in Washington, D.C., on March 31 and April 1, 1977]. Beverly Hills: Sage.

Kaplan, Barbara Hockey. Social Change in the Capitalist World Economy: [papers Presented At the First Annual Spring Conference On the Political Economy of the World System in Washington, D.C., On March 31 and April 1, 1977]. Beverly Hills: Sage, 1978.

Kaplan, Barbara Hockey. Social Change in the Capitalist World Economy: [papers Presented At the First Annual Spring Conference On the Political Economy of the World System in Washington, D.C., On March 31 and April 1, 1977]. Beverly Hills: Sage, 1978.