SINGH, D. V. (2014). GK PLANET - BOOK 7. P M PUBLISHERS.
Cita Chicago (17th ed.)SINGH, DHARAM VEER. GK PLANET - BOOK 7. P M PUBLISHERS, 2014.
Cita MLA (9th ed.)SINGH, DHARAM VEER. GK PLANET - BOOK 7. P M PUBLISHERS, 2014.
Atenció: Aquestes cites poden no estar 100% correctes.