APA (7th ed.) Citation

American Gas Association, Linear Programming, inc, & Mathematica, Inc. (1977). TERA (total energy resource analysis model) technical documentation. American Gas Association.

Chicago Style (17th ed.) Citation

American Gas Association, inc Linear Programming, and Inc Mathematica. TERA (total Energy Resource Analysis Model) Technical Documentation. [Arlington, Va.]: American Gas Association, 1977.

MLA (9th ed.) Citation

American Gas Association, et al. TERA (total Energy Resource Analysis Model) Technical Documentation. American Gas Association, 1977.