Harvard Business Review. (2017). HBR's 10 Must Reads on Sales. HBSP.
Lua i Stíl Chicago (17ú heag.)Harvard Business Review. HBR's 10 Must Reads on Sales. Boston, U.S: HBSP, 2017.
Lua MLA (9ú heag.)Harvard Business Review. HBR's 10 Must Reads on Sales. HBSP, 2017.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.