Freeman, C. (1990). The Economics of innovation. E. Elgar.
Chicagoスタイル(17版)引用形式Freeman, Christopher. The Economics of Innovation. Aldershot, Hants, England: E. Elgar, 1990.
MLA(9版)引用形式Freeman, Christopher. The Economics of Innovation. E. Elgar, 1990.
警告: この引用は必ずしも正確ではありません.