APA
International Congress of the Precast Concrete Industry, Lewis A. F. G., . (19). Fünfter Internationaler Kongress der Betonsteinindustrie. London: Cement and Concrete Association.
Chicago
International Congress of the Precast Concrete Industry, Lewis Alan F G, . 19. Fünfter Internationaler Kongress der Betonsteinindustrie. London: Cement and Concrete Association.
Harvard
International Congress of the Precast Concrete Industry, Lewis A. F. G., . (19). Fünfter Internationaler Kongress der Betonsteinindustrie. London: Cement and Concrete Association.
MLA
International Congress of the Precast Concrete Industry, Lewis Alan F G, . Fünfter Internationaler Kongress der Betonsteinindustrie. London: Cement and Concrete Association. 19.