Cita APA (7a ed.)

Holtz, H., & Zahn, D. (2004). How to succeed as an independent consultant (4th ed.). Wiley.

Cita Chicago Style (17a ed.)

Holtz, Herman, y David Zahn. How to Succeed as an Independent Consultant. 4th ed. Hoboken, N.J.: Wiley, 2004.

Cita MLA (8a ed.)

Holtz, Herman, y David Zahn. How to Succeed as an Independent Consultant. 4th ed. Wiley, 2004.