Cita APA (7a ed.)

(1989). Study on regional travel in the Philippines 1989. DOT/AIT.

Cita Chicago Style (17a ed.)

Study on Regional Travel in the Philippines 1989. [Quezon City]: DOT/AIT, 1989.

Cita MLA (9a ed.)

Study on Regional Travel in the Philippines 1989. DOT/AIT, 1989.