Citazione Stile APA (7a Edizione)

Philippines. Environmental Management Bureau. (1989). Ecological profile of Batangas. The Bureau.

Citazione stile Chigago Style (17a edizione)

Philippines. Environmental Management Bureau. Ecological Profile of Batangas. [Quezon City]: The Bureau, 1989.

Citatione MLA (9a ed.)

Philippines. Environmental Management Bureau. Ecological Profile of Batangas. The Bureau, 1989.