Lua APA (7ú heag.)

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.

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