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2. Bautista, M. L. S. 1981. An Explanatory Note: Round-table Conference on Philippine National Language Development. In: A. Gonzales and M. L. S. Bautista, eds., Aspects of Language Planning and Development in the Philippines. Manila: Linguistic Society of the Philippines.
3. Bowering, J. Sir. 1963. A Visit to the Philippine Islands in 1858. Manila: Filipiniana Book Guild Inc. reprint.
4. Clyne, M. 1991. Community Languages: The Australian Experience. Cambridge: Cambridge University Press.
5. Congressional Commission on Education. 1991. Making Education Work. Manila and Quezon City: Congress of the Republic of the Philippines.