Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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