(1960). Principles Of Business Organization And Operation William R. Spriegel. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Principles Of Business Organization And Operation William R. Spriegel. Prentice-Hall, 1960.
Lua MLA (8ú heag.)Principles Of Business Organization And Operation William R. Spriegel. Prentice-Hall, 1960.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.