Não informado. (1982). Contributions to Political Economy. Academic Press.
Chicago-referens (17:e uppl.)Não informado. Contributions to Political Economy. London: Academic Press, 1982.
MLA-referens (8:e uppl.)Não informado. Contributions to Political Economy. Academic Press, 1982.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.