Johnston, R. (2018). Service operations management (4th.). Pearson / Noida.
Lua i Stíl Chicago (17ú heag.)Johnston, Robert. Service Operations Management. 4th. Pearson / Noida, 2018.
Lua MLA (9ú heag.)Johnston, Robert. Service Operations Management. 4th. Pearson / Noida, 2018.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.