Lua APA (7ú heag.)
Elonka, S. M., & Kohan, A. L. (1969). Standard boiler operators' questions and answers. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)
Elonka, Stephen Michael, agus Anthony Lawrence Kohan. Standard Boiler Operators' Questions and Answers. New York ; New delhi: McGraw-Hill, 1969.
Lua MLA (9ú heag.)
Elonka, Stephen Michael, agus Anthony Lawrence Kohan. Standard Boiler Operators' Questions and Answers. McGraw-Hill, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.