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Lua i Stíl Chicago (17ú heag.)de la Garza-Ramos, María Isabel, Esther García, agus Raúl Lorente. Family Business: Relation Between Its Organizational Culture and Coninuity. Universidad Autónoma de Tamaulipas, 2006.
Lua MLA (8ú heag.)de la Garza-Ramos, María Isabel, et al. Family Business: Relation Between Its Organizational Culture and Coninuity. Universidad Autónoma de Tamaulipas, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.