Cita APA

(1972). How things work: The universal encyclopedia of machines. London: Paladin.

Chicago Style Citation

How Things Work: The Universal Encyclopedia of Machines. London: Paladin, 1972.

Cita MLA

How Things Work: The Universal Encyclopedia of Machines. London: Paladin, 1972.

Atenció: Aquestes cites poden no estar 100% correctes.