Não informado. (1922). Harvard Business School Bulletin. Harvard Business School.
Lua i Stíl Chicago (17ú heag.)Não informado. Harvard Business School Bulletin. Boston, Mass: Harvard Business School, 1922.
Lua MLA (8ú heag.)Não informado. Harvard Business School Bulletin. Harvard Business School, 1922.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.