Idorn, G. M. (1967). Durability of concrete structures in Denmark: A study of field behaviour and microscopic features. Teknisk Forlag.
Lua i Stíl Chicago (17ú heag.)Idorn, G. M. Durability of Concrete Structures in Denmark: A Study of Field Behaviour and Microscopic Features. Kobenhavn: Teknisk Forlag, 1967.
Lua MLA (8ú heag.)Idorn, G. M. Durability of Concrete Structures in Denmark: A Study of Field Behaviour and Microscopic Features. Teknisk Forlag, 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.