APA (7th ed.) Citation

Frei, E. J. (1949). The historical development of the Philippine national language. University of the Philippines.

Chicago Style (17th ed.) Citation

Frei, Ernest J. The Historical Development of the Philippine National Language. [Quezon City: University of the Philippines, 1949.

MLA (9th ed.) Citation

Frei, Ernest J. The Historical Development of the Philippine National Language. University of the Philippines, 1949.