Cita APA (7th ed.)

Karlson David. (2004). Marketing Your Consulting or Professional Services. Viva Books.

Cita Chicago (17th ed.)

Karlson David. Marketing Your Consulting or Professional Services. New Delhi: Viva Books, 2004.

Cita MLA (9th ed.)

Karlson David. Marketing Your Consulting or Professional Services. Viva Books, 2004.