SPE International Symposium on Oilfield Chemistry & States), S. o. P. E. (. (1991). 1991 SPE International Symposium on Oilfield Chemistry: Proceedings. Richardson, TX : Society of Petroleum Engineers.
Chicago-čujuhus (17. p.)SPE International Symposium on Oilfield Chemistry juo Society of Petroleum Engineers (United States). 1991 SPE International Symposium on Oilfield Chemistry: Proceedings. Richardson, TX : Society of Petroleum Engineers, 1991.
MLA-čujuhus (9. p.)SPE International Symposium on Oilfield Chemistry juo Society of Petroleum Engineers (United States). 1991 SPE International Symposium on Oilfield Chemistry: Proceedings. Richardson, TX : Society of Petroleum Engineers, 1991.
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