APA (7th ed.) Citation

Castillo, E. S. (1989). The Philippines within the context of the regional language centre: Perspectives in research. Philippine Journal of Linguistics.

Chicago Style (17th ed.) Citation

Castillo, Emma S. "The Philippines Within the Context of the Regional Language Centre: Perspectives in Research." Philippine Journal of Linguistics 1989.

MLA (9th ed.) Citation

Castillo, Emma S. "The Philippines Within the Context of the Regional Language Centre: Perspectives in Research." Philippine Journal of Linguistics, 1989.