Porter, L. J., & Tanner, S. J. (1996). Assessing business excellence: A guide to self-assessment. Butterworth/Heinemann.
Lua i Stíl Chicago (17ú heag.)Porter, L. J., agus S. J. Tanner. Assessing Business Excellence: A Guide to Self-assessment. Oxford: Butterworth/Heinemann, 1996.
Lua MLA (9ú heag.)Porter, L. J., agus S. J. Tanner. Assessing Business Excellence: A Guide to Self-assessment. Butterworth/Heinemann, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.