BECKMAN, P. (1995). Structural Aspects Of Building Conservation Poul Beckman. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)BECKMAN, Poul. Structural Aspects Of Building Conservation Poul Beckman. McGraw-Hill, 1995.
Lua MLA (8ú heag.)BECKMAN, Poul. Structural Aspects Of Building Conservation Poul Beckman. McGraw-Hill, 1995.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.