Philippines. National Economic Development Authority. (1975). Development in Region I: An annotated bibliography. National Economic Development Authority.
Cita Chicago (17th ed.)Philippines. National Economic Development Authority. Development in Region I: An Annotated Bibliography. [San Fernando, La Union]: National Economic Development Authority, 1975.
Cita MLA (9th ed.)Philippines. National Economic Development Authority. Development in Region I: An Annotated Bibliography. National Economic Development Authority, 1975.
Atenció: Aquestes cites poden no estar 100% correctes.