APA引文

Helpman, E. (1998). General purpose technologies and economic growth. MIT Press.

Chicago Style (17th ed.) Citation

Helpman, Elhanan. General Purpose Technologies and Economic Growth. Cambridge, Mass.: MIT Press, 1998.

MLA引文

Helpman, Elhanan. General Purpose Technologies and Economic Growth. MIT Press, 1998.

警告：這些引文格式不一定是100％准確.