Griffiths, S. M., & Griffiths, I. (2002). Law for purchasing and supply (3rd ed.). Financial Times/Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Griffiths, S. Margaret, agus Ivor Griffiths. Law for Purchasing and Supply. 3rd ed. Harlow: Financial Times/Prentice Hall, 2002.
Lua MLA (8ú heag.)Griffiths, S. Margaret, agus Ivor Griffiths. Law for Purchasing and Supply. 3rd ed. Financial Times/Prentice Hall, 2002.
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