APA
Brown H., . (1966). Challenge of mans future: An inquiry concerning the condition of man during the years that lie ahead. New Delhi: S Chand & Company Pvt. Ltd.
Chicago
Brown Harrison, . 1966. Challenge of mans future: An inquiry concerning the condition of man during the years that lie ahead. New Delhi: S Chand & Company Pvt. Ltd.
Harvard
Brown H., . (1966). Challenge of mans future: An inquiry concerning the condition of man during the years that lie ahead. New Delhi: S Chand & Company Pvt. Ltd.
MLA
Brown Harrison, . Challenge of mans future: An inquiry concerning the condition of man during the years that lie ahead. New Delhi: S Chand & Company Pvt. Ltd. 1966.