BALASUBRAMANIAN, P. (2013). TRIPS IN TIME - A TEXTBOOK FOR ICSE HISTORY AND CIVICS - BOOK 3. CAMBRIDGE UNIVERSITY PRESS.
Chicago-čujuhus (17. p.)BALASUBRAMANIAN, PREMA. TRIPS IN TIME - A TEXTBOOK FOR ICSE HISTORY AND CIVICS - BOOK 3. DELHI: CAMBRIDGE UNIVERSITY PRESS, 2013.
MLA-čujuhus (9. p.)BALASUBRAMANIAN, PREMA. TRIPS IN TIME - A TEXTBOOK FOR ICSE HISTORY AND CIVICS - BOOK 3. CAMBRIDGE UNIVERSITY PRESS, 2013.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.