Tohutoro APA (7th ed.)
Villarreal, O. (1999). Hotel and catering services: Resource file level 1 (1a. ed.). Macmillan.
Tohutoru Kātū Chicago (17th ed.)
Villarreal, Omar. Hotel and Catering Services: Resource File Level 1. 1a. ed. Buenos Aires: Macmillan, 1999.
Tohutoro MLA (9th ed.)
Villarreal, Omar. Hotel and Catering Services: Resource File Level 1. 1a. ed. Macmillan, 1999.
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