APA

Shepard S. B., . (1991). Business Week. New York: McGraw-Hill.

Chicago

Shepard Stephen B, . 1991. Business Week. New York: McGraw-Hill.

Harvard

Shepard S. B., . (1991). Business Week. New York: McGraw-Hill.

MLA

Shepard Stephen B, . Business Week. New York: McGraw-Hill. 1991.