APA
Sen Gupta B., . (1989). The Gorbachev factor in world affairs. New Delhi: Sales office, D.K. Publishers Distributors.
Chicago
Sen Gupta Bhabani, . 1989. The Gorbachev factor in world affairs. New Delhi: Sales office, D.K. Publishers Distributors.
Harvard
Sen Gupta B., . (1989). The Gorbachev factor in world affairs. New Delhi: Sales office, D.K. Publishers Distributors.
MLA
Sen Gupta Bhabani, . The Gorbachev factor in world affairs. New Delhi: Sales office, D.K. Publishers Distributors. 1989.