SINGH, D. V. (2014). GK PLANET - BOOK 7. P M PUBLISHERS.
Chicago Style aipamenaSINGH, DHARAM VEER. GK PLANET - BOOK 7. P M PUBLISHERS, 2014.
MLA aipamenaSINGH, DHARAM VEER. GK PLANET - BOOK 7. P M PUBLISHERS, 2014.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.