APA
Longman W., . (1989). Physical geography. Delhi: Akashdeep Publishing House.
Chicago
Longman W, . 1989. Physical geography. Delhi: Akashdeep Publishing House.
Harvard
Longman W., . (1989). Physical geography. Delhi: Akashdeep Publishing House.
MLA
Longman W, . Physical geography. Delhi: Akashdeep Publishing House. 1989.