JAYAKUMAR, N. (2016). EXPLORING GENERAL KNOWLEDGE - BOOK 1. CAMBRIDGE UNIVERSITY PRESS.
Lua i Stíl Chicago (17ú heag.)JAYAKUMAR, NAVIN. EXPLORING GENERAL KNOWLEDGE - BOOK 1. DELHI: CAMBRIDGE UNIVERSITY PRESS, 2016.
Lua MLA (9ú heag.)JAYAKUMAR, NAVIN. EXPLORING GENERAL KNOWLEDGE - BOOK 1. CAMBRIDGE UNIVERSITY PRESS, 2016.
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