SINGAL. S. (2012). PRACTICAL PHYSICS ICSE CLASS- IX. AVICHAL PUBLISHING COMPANY.
Lua i Stíl Chicago (17ú heag.)SINGAL. S. PRACTICAL PHYSICS ICSE CLASS- IX. AVICHAL PUBLISHING COMPANY, 2012.
Lua MLA (9ú heag.)SINGAL. S. PRACTICAL PHYSICS ICSE CLASS- IX. AVICHAL PUBLISHING COMPANY, 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.