SINGH & JAMES. (2011). PERFECT MATHEMATICS -2 ( TEACHER'S COPY ). EVERGREEN PUBLICATIONS.
Lua i Stíl Chicago (17ú heag.)SINGH & JAMES. PERFECT MATHEMATICS -2 ( TEACHER'S COPY ). EVERGREEN PUBLICATIONS, 2011.
Lua MLA (9ú heag.)SINGH & JAMES. PERFECT MATHEMATICS -2 ( TEACHER'S COPY ). EVERGREEN PUBLICATIONS, 2011.
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