WALKER, J. R. (2017). Introduction to hospitality. Pearson Education.
Lua i Stíl Chicago (17ú heag.)WALKER, John R. Introduction to Hospitality. Pearson Education, 2017.
Lua MLA (9ú heag.)WALKER, John R. Introduction to Hospitality. Pearson Education, 2017.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.