APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.