Philippines. Office of the President. Presidential Economic Staff. (1969). Provincial profile of Ilocos Norte. s.n.
Style de citation Chicago (17e éd.)Philippines. Office of the President. Presidential Economic Staff. Provincial Profile of Ilocos Norte. [Manila: s.n, 1969.
Style de citation MLA (9e éd.)Philippines. Office of the President. Presidential Economic Staff. Provincial Profile of Ilocos Norte. s.n, 1969.
Attention : ces citations peuvent ne pas être correctes à 100%.