APA

Williams R., Davis S. & Du Preez R. (1980). Improved method for generating influence surfaces for bridge decks. Pretoria: National Institute for Transport and Road Research. RR 289.

Chicago

Williams RD, Davis SG and Du Preez RJ. 1980. Improved method for generating influence surfaces for bridge decks. Pretoria: National Institute for Transport and Road Research. RR 289.

Harvard

Williams R., Davis S. and Du Preez R. (1980). Improved method for generating influence surfaces for bridge decks. Pretoria: National Institute for Transport and Road Research. RR 289.

MLA

Williams RD, Davis SG and Du Preez RJ. Improved method for generating influence surfaces for bridge decks. Pretoria: National Institute for Transport and Road Research. RR 289. 1980.