Frei, E. J. (1959). The historical development of the Philippine national language (Neudr. 1980.). Bureau of Printing Inst. of National Language.
Chicago Style (17th ed.) CitationFrei, Ernest J. The Historical Development of the Philippine National Language. Neudr. 1980. Manila: Bureau of Printing Inst. of National Language, 1959.
MLA (9th ed.) CitationFrei, Ernest J. The Historical Development of the Philippine National Language. Neudr. 1980. Bureau of Printing Inst. of National Language, 1959.
Warning: These citations may not always be 100% accurate.