Philippines. Department of Tourism. Planning Services. Plans and Programs Division. (1993). Study on regional travel in the Philippines: Household survey on travel patterns of Philippine residents 1993. DOT/AIT.
Lua i Stíl Chicago (17ú heag.)Philippines. Department of Tourism. Planning Services. Plans and Programs Division. Study on Regional Travel in the Philippines: Household Survey on Travel Patterns of Philippine Residents 1993. [Quezon City]: DOT/AIT, 1993.
Lua MLA (9ú heag.)Philippines. Department of Tourism. Planning Services. Plans and Programs Division. Study on Regional Travel in the Philippines: Household Survey on Travel Patterns of Philippine Residents 1993. DOT/AIT, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.