APA
Keller W., The World Bank, . (1997). How trade patterns and technology flows affect productivity growth. Washigton: World Bank.
Chicago
Keller Wolfgang, The World Bank, . 1997. How trade patterns and technology flows affect productivity growth. Washigton: World Bank.
Harvard
Keller W., The World Bank, . (1997). How trade patterns and technology flows affect productivity growth. Washigton: World Bank.
MLA
Keller Wolfgang, The World Bank, . How trade patterns and technology flows affect productivity growth. Washigton: World Bank. 1997.