APA

International Association for Bridge and Structural Engineering, . (1980). 11th congress of the International Association for Bridge and Structural Engineering. : .

Chicago

International Association for Bridge and Structural Engineering, . 1980. 11th congress of the International Association for Bridge and Structural Engineering. : .

Harvard

International Association for Bridge and Structural Engineering, . (1980). 11th congress of the International Association for Bridge and Structural Engineering. : .

MLA

International Association for Bridge and Structural Engineering, . 11th congress of the International Association for Bridge and Structural Engineering. : . 1980.