APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (8e ed.) Bronvermelding

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