APA (7th ed.) Zitazioa
Norbury, D. (2016). Soil and rock description in engineering practice (Second edition.). Whittles Publishing.
Chicago Style (17th ed.) Zitazioa
Norbury, David. Soil and Rock Description in Engineering Practice. Second edition. Dunbeath, Scotland, UK: Whittles Publishing, 2016.
MLA (9th ed.) Zitazioa
Norbury, David. Soil and Rock Description in Engineering Practice. Second edition. Whittles Publishing, 2016.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.