APA aipamena

BELL, F. Ground engineer-s reference book. Butterworths.

Chicago Style aipamena

BELL, F.G. Ground Engineer-s Reference Book. Butterworths.

MLA aipamena

BELL, F.G. Ground Engineer-s Reference Book. Butterworths.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.