APA (7th ed.) Citation

Apilado, D. B. (2000). A history of the Ilocos. Social Science Information.

Chicago Style (17th ed.) Citation

Apilado, Digna B. "A History of the Ilocos." Social Science Information 2000.

MLA (9th ed.) Citation

Apilado, Digna B. "A History of the Ilocos." Social Science Information, 2000.

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