(en) Hans Joshua V. Dantes et Mark Christian M. Manalang, The Manila Times And Manuel L. Quezon – A Historical Case Study On Media Ownership And Politics, University of the Philippines College of Mass Communication (lire en ligne), p. 14-20.
psa.gov.ph
(en) « Communications », dans The Philippines Yearbook 2013, Philippine Statistics Authority, (lire en ligne), tableau 20.13