APA

,, . (2006). Themes in World history : Textbook in history for class XI. New Delhi: N C E R T.

Chicago

,, . 2006. Themes in World history : Textbook in history for class XI. New Delhi: N C E R T.

Harvard

,, . (2006). Themes in World history : Textbook in history for class XI. New Delhi: N C E R T.

MLA

,, . Themes in World history : Textbook in history for class XI. New Delhi: N C E R T. 2006.