APA

(1973). Studies in the pure theory of international trade. New York: St. Martin's Press.

Chicago

1973. Studies in the pure theory of international trade. New York: St. Martin's Press.

Harvard

(1973). Studies in the pure theory of international trade. New York: St. Martin's Press.

MLA

Studies in the pure theory of international trade. New York: St. Martin's Press. 1973.