Hardin, R. (1982). Collective action. Johns Hopkins University Press.
Cita Chicago (17th ed.)Hardin, Russell. Collective Action. London: Johns Hopkins University Press, 1982.
Cita MLA (9th ed.)Hardin, Russell. Collective Action. Johns Hopkins University Press, 1982.
Atenció: Aquestes cites poden no estar 100% correctes.