APA

Keen P., . (2000). The eProcess Edge: creating customer value and business wealth in the internet era. New York: McGraw-Hill.

Chicago

Keen Peter, . 2000. The eProcess Edge: creating customer value and business wealth in the internet era. New York: McGraw-Hill.

Harvard

Keen P., . (2000). The eProcess Edge: creating customer value and business wealth in the internet era. New York: McGraw-Hill.

MLA

Keen Peter, . The eProcess Edge: creating customer value and business wealth in the internet era. New York: McGraw-Hill. 2000.