Galenson,Walter, & Harviy Leibenstein. (1955). Investment Criteria, Productivity and Economic Development. Quarterly Journal of Eonomics.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিGalenson,Walter, এবং Harviy Leibenstein. Investment Criteria, Productivity and Economic Development. New Jersey: Quarterly Journal of Eonomics, 1955.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিGalenson,Walter, এবং Harviy Leibenstein. Investment Criteria, Productivity and Economic Development. Quarterly Journal of Eonomics, 1955.