BITTEL. (1974). What Every Supervisor Should Know Bittel. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)BITTEL. What Every Supervisor Should Know Bittel. McGraw-Hill, 1974.
Lua MLA (8ú heag.)BITTEL. What Every Supervisor Should Know Bittel. McGraw-Hill, 1974.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.