APA aipamena

Institution, 8. B. S. (1990). Cross recesses for screws. London : British Standards Institution.

Chicago Style aipamena

Institution, 8096 British Standards. Cross Recesses for Screws. London : British Standards Institution, 1990.

MLA aipamena

Institution, 8096 British Standards. Cross Recesses for Screws. London : British Standards Institution, 1990.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.