Griffiths, S. M., & Griffiths, I. (2002). Law for purchasing and supply (3rd ed.). Financial Times/Prentice Hall.

Griffiths, S. Margaret, and Ivor Griffiths. Law for Purchasing and Supply. 3rd ed. Harlow: Financial Times/Prentice Hall, 2002.

Griffiths, S. Margaret, and Ivor Griffiths. Law for Purchasing and Supply. 3rd ed. Financial Times/Prentice Hall, 2002.