APA (7th ed.) Citation

Vibal Multimedia (Firm), Vibal Publishing House, Inc, Mata, N. V., Espino, C. M., Ursua, A., & Vinluan, E. (2006). Regions of the Philippines. Vibal Pub. House.

Chicago Style (17th ed.) Citation

Vibal Multimedia (Firm), Inc Vibal Publishing House, Nila V. Mata, Carina M. Espino, Alfred Ursua, and Elsie Vinluan. Regions of the Philippines. Quezon City: Vibal Pub. House, 2006.

MLA (9th ed.) Citation

Vibal Multimedia (Firm), et al. Regions of the Philippines. Vibal Pub. House, 2006.