STEINHOFF, D. (1979). The World Of Business Dan Steinhoff. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)STEINHOFF, Dan. The World Of Business Dan Steinhoff. McGraw-Hill, 1979.
Lua MLA (8ú heag.)STEINHOFF, Dan. The World Of Business Dan Steinhoff. McGraw-Hill, 1979.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.