Philippines. National Council on Integrated Area Development. (1983). Abra integrated area development project. NACIAD.
Chicago-Zitierstil (17. Ausg.)Philippines. National Council on Integrated Area Development. Abra Integrated Area Development Project. Quezon City: NACIAD, 1983.
MLA-Zitierstil (9. Ausg.)Philippines. National Council on Integrated Area Development. Abra Integrated Area Development Project. NACIAD, 1983.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.