Gordon, J. E. (1978). Structures: Or, Why things don't fall down. Penquin Books.
Lua i Stíl Chicago (17ú heag.)Gordon, J. E. Structures: Or, Why Things Don't Fall Down. Harmondsworth, New York: Penquin Books, 1978.
Lua MLA (9ú heag.)Gordon, J. E. Structures: Or, Why Things Don't Fall Down. Penquin Books, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.