Elonka, S. M. (1959). Standard plant operator's question and answers: A modern license-examination review course for plant, refrigeration, steam, diesel, nuclear, eletrical and building engineers. McGraw-Hill.
Chicago Style (17th ed.) CitationElonka, Stephen Michael. Standard Plant Operator's Question and Answers: A Modern License-examination Review Course for Plant, Refrigeration, Steam, Diesel, Nuclear, Eletrical and Building Engineers. New York [u.a.]: McGraw-Hill, 1959.
MLA (9th ed.) CitationElonka, Stephen Michael. Standard Plant Operator's Question and Answers: A Modern License-examination Review Course for Plant, Refrigeration, Steam, Diesel, Nuclear, Eletrical and Building Engineers. McGraw-Hill, 1959.
Warning: These citations may not always be 100% accurate.