Lilly, W. E. (1907). Economic design of columns.
Lua i Stíl Chicago (17ú heag.)Lilly, W. E. Economic Design of Columns. 1907.
Lua MLA (9ú heag.)Lilly, W. E. Economic Design of Columns. 1907.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
