Cita APA (7th ed.)

Schwab, K. (2016). The fourth industrial revolution (1.ed.). protfolio penguin.

Cita Chicago (17th ed.)

Schwab, Klaus. The Fourth Industrial Revolution. 1.ed. england: protfolio penguin, 2016.

Cita MLA (9th ed.)

Schwab, Klaus. The Fourth Industrial Revolution. 1.ed. protfolio penguin, 2016.