Forstner, H., & Ballance, R. (1990). Competing in a global economy: An empirical study on specialization and trade in manufactures. Unwin Hyman.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিForstner, Helmut, এবং Robert Ballance. Competing in a Global Economy: An Empirical Study on Specialization and Trade in Manufactures. London ; Boston: Unwin Hyman, 1990.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিForstner, Helmut, এবং Robert Ballance. Competing in a Global Economy: An Empirical Study on Specialization and Trade in Manufactures. Unwin Hyman, 1990.