APA (7th ed.) Citation

Frei, E. J. (1959). The historical development of the Philippine national language. Bureau of Printing.

Chicago Style (17th ed.) Citation

Frei, Ernest John. The Historical Development of the Philippine National Language. Manila: Bureau of Printing, 1959.

MLA (9th ed.) Citation

Frei, Ernest John. The Historical Development of the Philippine National Language. Bureau of Printing, 1959.

Warning: These citations may not always be 100% accurate.