Blanchard, K. H., & Miller, M. (2007). The secret: What great leaders know-and do. Berrett-Koehler Publishers.
Lua i Stíl Chicago (17ú heag.)Blanchard, Kenneth H., agus Mark Miller. The Secret: What Great Leaders Know-and Do. San Francisco: Berrett-Koehler Publishers, 2007.
Lua MLA (8ú heag.)Blanchard, Kenneth H., agus Mark Miller. The Secret: What Great Leaders Know-and Do. Berrett-Koehler Publishers, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.