Cita APA (7a ed.)
Elonka, S. M., & Kohan, A. L. (1969). Standard boiler operators' questions and answers. McGraw-Hill.
Cita Chicago Style (17a ed.)
Elonka, Stephen Michael, y Anthony Lawrence Kohan. Standard Boiler Operators' Questions and Answers. New York ; New delhi: McGraw-Hill, 1969.
Cita MLA (9a ed.)
Elonka, Stephen Michael, y Anthony Lawrence Kohan. Standard Boiler Operators' Questions and Answers. McGraw-Hill, 1969.
Precaución: Estas citas no son 100% exactas.