APA

International Economic Association, Samuelson P. A., . (1969). International economic relations: proceedings of the Third Congress of the International Economic Association [held in Montreal, 2-7 Sept. 1968]. London: Macmillan.

Chicago

International Economic Association, Samuelson Paul Anthony, . 1969. International economic relations: proceedings of the Third Congress of the International Economic Association [held in Montreal, 2-7 Sept. 1968]. London: Macmillan.

Harvard

International Economic Association, Samuelson P. A., . (1969). International economic relations: proceedings of the Third Congress of the International Economic Association [held in Montreal, 2-7 Sept. 1968]. London: Macmillan.

MLA

International Economic Association, Samuelson Paul Anthony, . International economic relations: proceedings of the Third Congress of the International Economic Association [held in Montreal, 2-7 Sept. 1968]. London: Macmillan. 1969.