APA (7th ed.) Citation

Elonka, S. M., & Kohan, A. L. (1969). Standard boiler operators' questions and answers. McGraw-Hill.

Chicago Style (17th ed.) Citation

Elonka, Stephen Michael, and Anthony Lawrence Kohan. Standard Boiler Operators' Questions and Answers. New York,: McGraw-Hill, 1969.

MLA (8th ed.) Citation

Elonka, Stephen Michael, and Anthony Lawrence Kohan. Standard Boiler Operators' Questions and Answers. McGraw-Hill, 1969.