Citazione APA

Robert A Denemark, Barry K Gills, George Modelski, & Jonathan Friedman. (2000). World system history: The social science of long-term change. Routledge.

Stile di citazione Chicago

Robert A Denemark, Barry K Gills, George Modelski, e Jonathan Friedman. World System History: The Social Science of Long-term Change. London: Routledge, 2000.

Citazione MLA

Robert A Denemark, et al. World System History: The Social Science of Long-term Change. Routledge, 2000.