Smith, R. V. (1983). Practical natural gas engineering. PennWell Books.
Čikaški stil citiranja (17. izdanje)Smith, R. V. Practical Natural Gas Engineering. Tulsa, Okla.: PennWell Books, 1983.
MLA način citiranja (8. izdanje)Smith, R. V. Practical Natural Gas Engineering. PennWell Books, 1983.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.