Stewart, V. (2006). Improving poor performance detection causes & remedies. Infinity Books.
Lua i Stíl Chicago (17ú heag.)Stewart, Valerie. Improving Poor Performance Detection Causes & Remedies. New Delhi: Infinity Books, 2006.
Lua MLA (9ú heag.)Stewart, Valerie. Improving Poor Performance Detection Causes & Remedies. Infinity Books, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.