BALASUBRAMANIAN, P. (2013). TRIPS IN TIME A TEXTBOOK FOR ICSE HISTORY AND CIVICS - BOOK 1. CAMBRIDGE UNIVERSITY PRESS.
Lua i Stíl Chicago (17ú heag.)BALASUBRAMANIAN, PREMA. TRIPS IN TIME A TEXTBOOK FOR ICSE HISTORY AND CIVICS - BOOK 1. NEW DELHI: CAMBRIDGE UNIVERSITY PRESS, 2013.
Lua MLA (9ú heag.)BALASUBRAMANIAN, PREMA. TRIPS IN TIME A TEXTBOOK FOR ICSE HISTORY AND CIVICS - BOOK 1. CAMBRIDGE UNIVERSITY PRESS, 2013.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.