Greenhalgh, C. (1990). Innovation and Trade Performance in the United Kingdom.
Chicago-čujuhus (17. p.)Greenhalgh, C. Innovation and Trade Performance in the United Kingdom. 1990.
MLA-čujuhus (9. p.)Greenhalgh, C. Innovation and Trade Performance in the United Kingdom. 1990.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.