APA
(2009). Improve your knowledge;Vol2 # Improve your knowledge;Vol1 # Improve your Knowledge. Jaipur: Mark Publishers.
Chicago
2009. Improve your knowledge;Vol2 # Improve your knowledge;Vol1 # Improve your Knowledge. Jaipur: Mark Publishers.
Harvard
(2009). Improve your knowledge;Vol2 # Improve your knowledge;Vol1 # Improve your Knowledge. Jaipur: Mark Publishers.
MLA
Improve your knowledge;Vol2 # Improve your knowledge;Vol1 # Improve your Knowledge. Jaipur: Mark Publishers. 2009.