Philippine Business Profiles and Perspectives, Inc. (2012). Top 15000 corporations : the Philippine economy: Reaches the tipping point (Business Profiles 2011-12 edition.). PBPPI.
Lua i Stíl Chicago (17ú heag.)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.
Lua MLA (9ú heag.)Philippine Business Profiles and Perspectives, Inc. Top 15000 Corporations : The Philippine Economy: Reaches the Tipping Point. Business Profiles 2011-12 edition. PBPPI, 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.