Hoff and Overgaard & World Tourism Organization. (1992). Tourism master plan for the Philippines. World Tourism Organization.
Lua i Stíl Chicago (17ú heag.)Hoff and Overgaard agus World Tourism Organization. Tourism Master Plan for the Philippines. [Madridn]: World Tourism Organization, 1992.
Lua MLA (9ú heag.)Hoff and Overgaard agus World Tourism Organization. Tourism Master Plan for the Philippines. World Tourism Organization, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.