APA

Ekelund Robert B, H, . (19901997). A history of economic theory and method. New York: McGraw-Hill.

Chicago

Ekelund Robert B, H, . 19901997. A history of economic theory and method. New York: McGraw-Hill.

Harvard

Ekelund Robert B, H, . (19901997). A history of economic theory and method. New York: McGraw-Hill.

MLA

Ekelund Robert B, H, . A history of economic theory and method. New York: McGraw-Hill. 19901997.