Ижил төстэй зүйлс: Gk with Derek the ultimate general knowledge and quiz compendium: literature and mythology
- Gk with derek the ultimate general knowledge and quiz compendium: 4 india
- Gk with Derek the ultimate general knowledge and quiz compendium: sports and cinema
- Gk with Derek the ultimate general knowledge and quiz compendium: 1 history and geography
- Gk with derek the ultimate general knowledge and quiz compendium :3 science and wildlife
- Gk with derek the ultimate general knowledge and quiz com ndium : 2 business
- Lucid General knowledge : for every Indian citizen
Зохиогч: O'Brien, Derek
- Gk with derek the ultimate general knowledge and quiz com ndium : 2 business
- Gk with derek the ultimate general knowledge and quiz compendium: 4 india
- Gk with Derek the ultimate general knowledge and quiz compendium: literature and mythology
- Gk with Derek the ultimate general knowledge and quiz compendium: sports and cinema