BROWN, G. (1972). Survey Economic Principles Gray Brown. Richard D. Irwin.
Lua i Stíl Chicago (17ú heag.)BROWN, Gray. Survey Economic Principles Gray Brown. Richard D. Irwin, 1972.
Lua MLA (8ú heag.)BROWN, Gray. Survey Economic Principles Gray Brown. Richard D. Irwin, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.