Greenaway, D., & Milner, C. (1979). Protectionism again?: Causes and consequences of a retreat from freer trade. Institute of Economic Affairs.
Chicago-referens (17:e uppl.)Greenaway, David, och Christopher Milner. Protectionism Again?: Causes and Consequences of a Retreat from Freer Trade. London: Institute of Economic Affairs, 1979.
MLA-referens (9:e uppl.)Greenaway, David, och Christopher Milner. Protectionism Again?: Causes and Consequences of a Retreat from Freer Trade. Institute of Economic Affairs, 1979.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.