Citazione Stile APA (7a Edizione)

Javellana, R. B., & Tan, J. M. L. (1997). Fortress of empire: Spanish colonial fortifications of the Philippines, 1565-1898. Bookmark.

Citazione stile Chigago Style (17a edizione)

Javellana, Rene B., e Jose Ma. Lorenzo Tan. Fortress of Empire: Spanish Colonial Fortifications of the Philippines, 1565-1898. Makati City, Philippines: Bookmark, 1997.

Citatione MLA (9a ed.)

Javellana, Rene B., e Jose Ma. Lorenzo Tan. Fortress of Empire: Spanish Colonial Fortifications of the Philippines, 1565-1898. Bookmark, 1997.