APA

De los Reyes I. F., Imson M. E. P., . (2014). History of Ilocos, volumes I and II. Quezon City: The University of the Philippines Press.

Chicago

De los Reyes Isabelo Florentino, Imson Maria Elinora Peralta, . 2014. History of Ilocos, volumes I and II. Quezon City: The University of the Philippines Press.

Harvard

De los Reyes I. F., Imson M. E. P., . (2014). History of Ilocos, volumes I and II. Quezon City: The University of the Philippines Press.

MLA

De los Reyes Isabelo Florentino, Imson Maria Elinora Peralta, . History of Ilocos, volumes I and II. Quezon City: The University of the Philippines Press. 2014.