Friedman, E. (1982). Ascent and decline in the world-system. Sage.
Cita Chicago (17th ed.)Friedman, Edward. Ascent and Decline in the World-system. Beverly Hills: Sage, 1982.
Cita MLA (9th ed.)Friedman, Edward. Ascent and Decline in the World-system. Sage, 1982.
Atenció: Aquestes cites poden no estar 100% correctes.