Dating, A. A. (1971). Teachers' opinions on the competencies needed by elementary school principals in Camarines Norte, 1969-1970. s.n.].
Citazione stile Chigago Style (17a edizione)Dating, Agustin A. Teachers' Opinions on the Competencies Needed by Elementary School Principals in Camarines Norte, 1969-1970. [Quezon City: s.n.], 1971.
Citatione MLA (9a ed.)Dating, Agustin A. Teachers' Opinions on the Competencies Needed by Elementary School Principals in Camarines Norte, 1969-1970. s.n.], 1971.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.