APA

Gray H. P., . (1987). International economic problems and policies. New York: St. Martin's Press.

Chicago

Gray H Peter, . 1987. International economic problems and policies. New York: St. Martin's Press.

Harvard

Gray H. P., . (1987). International economic problems and policies. New York: St. Martin's Press.

MLA

Gray H Peter, . International economic problems and policies. New York: St. Martin's Press. 1987.