Hay, N. E. (1985). Guide to new natural gas utilization technologies. Fairmont Press.
Citace podle Chicago (17th ed.)Hay, Nelson E. Guide to New Natural Gas Utilization Technologies. Atlanta, GA: Fairmont Press, 1985.
Citace podle MLA (9th ed.)Hay, Nelson E. Guide to New Natural Gas Utilization Technologies. Fairmont Press, 1985.