APA (7th ed.) Zitazioa

Powell, G. R. (2002). Return on marketing investment: Demand more from your marketing and sales investments (1a. ed.). RPI.

Chicago Style (17th ed.) Zitazioa

Powell, Guy R. Return on Marketing Investment: Demand More from Your Marketing and Sales Investments. 1a. ed. Albuquerque: RPI, 2002.

MLA (9th ed.) Zitazioa

Powell, Guy R. Return on Marketing Investment: Demand More from Your Marketing and Sales Investments. 1a. ed. RPI, 2002.