Lua APA (7ú heag.)
Norbury, D. (2016). Soil and rock description in engineering practice (Second edition.). Whittles Publishing.
Lua i Stíl Chicago (17ú heag.)
Norbury, David. Soil and Rock Description in Engineering Practice. Second edition. Dunbeath, Scotland, UK: Whittles Publishing, 2016.
Lua MLA (9ú heag.)
Norbury, David. Soil and Rock Description in Engineering Practice. Second edition. Whittles Publishing, 2016.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.