Zobel de Ayala II, J. A. (2003). The challenges and opportunities in the Philippine Services Sector. SGV Review.
Čikaški stil citiranja (17. izdanje)Zobel de Ayala II, Jaime Augusto. "The Challenges and Opportunities in the Philippine Services Sector." SGV Review 2003.
MLA način citiranja (9. izdanje)Zobel de Ayala II, Jaime Augusto. "The Challenges and Opportunities in the Philippine Services Sector." SGV Review, 2003.
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