APA (7th ed.) Citation

De Villa, J. G., & De Villa, R. (1997). Philippine vacations & explorations (2nd ed.). Brier Projects.

Chicago Style (17th ed.) Citation

De Villa, Jill Gale, and Rebecca De Villa. Philippine Vacations & Explorations. 2nd ed. Makati: Brier Projects, 1997.

MLA (9th ed.) Citation

De Villa, Jill Gale, and Rebecca De Villa. Philippine Vacations & Explorations. 2nd ed. Brier Projects, 1997.