APA

American Society of Civil Engineers, . (1981). Underground plastic pipe. Proceedings of the international conference, New Orleans, Louisiana, March 30 - April 1, 1981. New York, NY: American Society of Civil Engineers.

Chicago

American Society of Civil Engineers, . 1981. Underground plastic pipe. Proceedings of the international conference, New Orleans, Louisiana, March 30 - April 1, 1981. New York, NY: American Society of Civil Engineers.

Harvard

American Society of Civil Engineers, . (1981). Underground plastic pipe. Proceedings of the international conference, New Orleans, Louisiana, March 30 - April 1, 1981. New York, NY: American Society of Civil Engineers.

MLA

American Society of Civil Engineers, . Underground plastic pipe. Proceedings of the international conference, New Orleans, Louisiana, March 30 - April 1, 1981. New York, NY: American Society of Civil Engineers. 1981.