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