APA (7th ed.) Citation

Villaroel, F. (2000). Philip II and the "Philippine referendum" of 1599. Unitas.

Chicago Style (17th ed.) Citation

Villaroel, Fidel. "Philip II and the "Philippine Referendum" of 1599." Unitas 2000.

MLA (9th ed.) Citation

Villaroel, Fidel. "Philip II and the "Philippine Referendum" of 1599." Unitas, 2000.

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