APA
Manku D. S., . (2001). Regional geography of the world. Ludhiana: Kalyani Publishers.
Chicago
Manku Darshan Singh, . 2001. Regional geography of the world. Ludhiana: Kalyani Publishers.
Harvard
Manku D. S., . (2001). Regional geography of the world. Ludhiana: Kalyani Publishers.
MLA
Manku Darshan Singh, . Regional geography of the world. Ludhiana: Kalyani Publishers. 2001.