Não informado. (1991). Structural Engineering International. International Association for Bridge and Structural Engineering.
Chicago (17e ed.) BronvermeldingNão informado. Structural Engineering International. Zurich, Suíça: International Association for Bridge and Structural Engineering, 1991.
MLA (8e ed.) BronvermeldingNão informado. Structural Engineering International. International Association for Bridge and Structural Engineering, 1991.
Let op: Deze citaties zijn niet altijd 100% accuraat.