Barnes, D., Forster, C. F., & Hrudey, S. E. (1984). Petroleum and organic chemicals industries. Pitman Advanced Pub. Program.
Lua i Stíl Chicago (17ú heag.)Barnes, D., C F. Forster, agus S E. Hrudey. Petroleum and Organic Chemicals Industries. Boston: Pitman Advanced Pub. Program, 1984.
Lua MLA (9ú heag.)Barnes, D., et al. Petroleum and Organic Chemicals Industries. Pitman Advanced Pub. Program, 1984.
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