Gordon, J. E. (1978). Structures: Or, Why things don't fall down. Penquin Books.
Citazione stile Chigago Style (17a edizione)Gordon, J. E. Structures: Or, Why Things Don't Fall Down. Harmondsworth, New York: Penquin Books, 1978.
Citatione MLA (9a ed.)Gordon, J. E. Structures: Or, Why Things Don't Fall Down. Penquin Books, 1978.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.