Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (8a ed.)

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