APA (7th ed.) Citation

Cooper, G. A. S. (1949). Large mains are cheaper than small mains if you expect your business to expand. Proceedings of the American Gas Association, 1949, 634.

Chicago Style (17th ed.) Citation

Cooper, G. A. S. "Large Mains Are Cheaper than Small Mains If You Expect Your Business to Expand." Proceedings of the American Gas Association 1949 (1949): 634.

MLA (9th ed.) Citation

Cooper, G. A. S. "Large Mains Are Cheaper than Small Mains If You Expect Your Business to Expand." Proceedings of the American Gas Association, vol. 1949, 1949, p. 634.