Gaya APA

Repetto, R., Speth, J, G. (2006). Punctuated Equilibrium and the dynamics of u.s environmental policy . London: Yale University Press.

Gaya MLA

Repetto, Robert., Speth, James, Gustave. "Punctuated Equilibrium and the dynamics of u.s environmental policy". London: Yale University Press, 2006. Text.