American Gas Association. Laboratories. Engineering Services Department, American Gas Association, & Gas Appliance Manufacturers Association. (1977). Fundamentals of service to the customer. American Gas Association.
Chicago Style (17th ed.) CitationAmerican Gas Association. Laboratories. Engineering Services Department, American Gas Association, and Gas Appliance Manufacturers Association. Fundamentals of Service to the Customer. Arlington, VA: American Gas Association, 1977.
MLA (9th ed.) CitationAmerican Gas Association. Laboratories. Engineering Services Department, et al. Fundamentals of Service to the Customer. American Gas Association, 1977.
Warning: These citations may not always be 100% accurate.