APA (7e ed.) Bronvermelding

Dating, A. A. (1977). Teachers' opinions on the competencies needed by elementary school principals in Camarines Norte, 1969-1970 [microform]. Photoduplication Service. University of the Philippines Library.

Chicago (17e ed.) Bronvermelding

Dating, Agustin A. Teachers' Opinions on the Competencies Needed by Elementary School Principals in Camarines Norte, 1969-1970 [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1977.

MLA (9e ed.) Bronvermelding

Dating, Agustin A. Teachers' Opinions on the Competencies Needed by Elementary School Principals in Camarines Norte, 1969-1970 [microform]. Photoduplication Service. University of the Philippines Library, 1977.