Παραπομπή σε μορφή APA (7η εκδ.)

Ries, A. (2005). Focus: The future of your company depends on it ([2nd ed.].). HarperCollins.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Ries, Al. Focus: The Future of Your Company Depends on It. [2nd ed.]. New York: HarperCollins, 2005.

Παραπομπή σε μορφή MLA (9th εκδ.)

Ries, Al. Focus: The Future of Your Company Depends on It. [2nd ed.]. HarperCollins, 2005.