Villaroel, F. (2000). Philip II and the "Philippine referendum" of 1599. Unitas.
芝加哥风格引文Villaroel, Fidel. "Philip II and the "Philippine Referendum" of 1599." Unitas 2000.
MLA引文Villaroel, Fidel. "Philip II and the "Philippine Referendum" of 1599." Unitas, 2000.
警告：这些引文格式不一定是100％准确.