Ser-Vo-Tel Institute. (1974). Customer/employee relationships: Donald D. Todd [and] Joanne M. O'Haver. Cahners Books.
Lua i Stíl Chicago (17ú heag.)Ser-Vo-Tel Institute. Customer/employee Relationships: Donald D. Todd [and] Joanne M. O'Haver. Boston: Cahners Books, 1974.
Lua MLA (9ú heag.)Ser-Vo-Tel Institute. Customer/employee Relationships: Donald D. Todd [and] Joanne M. O'Haver. Cahners Books, 1974.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.