Cita APA (7a ed.)

Johnson, S. (2014). How we got to now: Six innovations that made the modern world.

Cita Chicago Style (17a ed.)

Johnson, Steven. How We Got to Now: Six Innovations That Made the Modern World. 2014.

Cita MLA (8a ed.)

Johnson, Steven. How We Got to Now: Six Innovations That Made the Modern World. 2014.

Precaución: Estas citas no son 100% exactas.