APA (7th ed.) Zitazioa
Williams, J. (2008). Engineering tribology. Cambridge University Press.
Chicago Style (17th ed.) Zitazioa
Williams, John. Engineering Tribology. New York: Cambridge University Press, 2008.
MLA (9th ed.) Zitazioa
Williams, John. Engineering Tribology. Cambridge University Press, 2008.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.