Heller Robert. (1998). Managing Change. D K Publication.
Lua i Stíl Chicago (17ú heag.)Heller Robert. Managing Change. [s.l]: D K Publication, 1998.
Lua MLA (9ú heag.)Heller Robert. Managing Change. D K Publication, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.