1. McDonald, M.: Strategic Marketing Planning [Strategicheskoye Planirovaniye Marketinga], pp. 320. Piter (2000)
2. Assel, H.: Marketing: Principles and Strategy: Textbook for Universities Marketing: [Printsipy i strategiya: Uchebnik dlya vuzov], p. 804. INFRA-M, M. (1999)
3. Randall Richard, C.: The Quality Yearbook. Published by McGraw-Hill, Inc.
4. Tugan-Baranovsky, M., Balabanova, L.V.: Marketing management. Scientific publication [Mapкeтинг мeнeджмeнт. Hayчнoe издaниe], p. 594. DonGUET, Donetsk (2001)
5. Galina, Y.: Marketing efficiency: methodology, evaluation and results. Practical Marketing [Effektivnost’ marketinga: metodika, otsenki i rezul’taty. Prakticheskiy marketing г]. No 8 (78) (2003)