Philippine Business Profiles and Perspectives, Inc. (2012). Top 15000 corporations : the Philippine economy: Reaches the tipping point (Business Profiles 2011-12 edition.). PBPPI.
Chicago-referens (17:e uppl.)Philippine Business Profiles and Perspectives, Inc. Top 15000 Corporations : The Philippine Economy: Reaches the Tipping Point. Business Profiles 2011-12 edition. Pasig City: PBPPI, 2012.
MLA-referens (9:e uppl.)Philippine Business Profiles and Perspectives, Inc. Top 15000 Corporations : The Philippine Economy: Reaches the Tipping Point. Business Profiles 2011-12 edition. PBPPI, 2012.
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