APA-referens (7:e uppl.)

Não informado. Studies in economics and political science. London School of Economics and Political Science.

Chicago-referens (17:e uppl.)

Não informado. Studies in Economics and Political Science. London: London School of Economics and Political Science.

MLA-referens (8:e uppl.)

Não informado. Studies in Economics and Political Science. London School of Economics and Political Science.

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