Elder, A. J. (1977). Guide to the Building Regulations, 1976 (5th ed.). Architectural Press.
Lua i Stíl Chicago (17ú heag.)Elder, Albert Joseph. Guide to the Building Regulations, 1976. 5th ed. London: Architectural Press, 1977.
Lua MLA (9ú heag.)Elder, Albert Joseph. Guide to the Building Regulations, 1976. 5th ed. Architectural Press, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.