WALTHAM TONY. (2002). FOUNDATIONS OF ENGINEERING GEOLOGY. UNIVERSITY PRESS.
Lua i Stíl Chicago (17ú heag.)WALTHAM TONY. FOUNDATIONS OF ENGINEERING GEOLOGY. MUMBAI: UNIVERSITY PRESS, 2002.
Lua MLA (9ú heag.)WALTHAM TONY. FOUNDATIONS OF ENGINEERING GEOLOGY. UNIVERSITY PRESS, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.